diff --git a/NEWS b/NEWS
index 704b20e..59a105f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,27 @@
 History of Nife releases :
 
+2015-08-10 - Nife 0.55 is released.
+	* Changing the log file contents to be able to use it for debugging.
+	  The log file is in the subdirectory .nife. His name is the type
+	  .nife_PID.log, PID being its number of pid.
+	  We can display the content in real time with tail -f.
+	  The .nifeNS_pid.log and .nifeRPC_PID.log files are those of the
+	  server networks and its bodies.
+	  Log files are deleted at the end of the Nife session unless an error
+	  occured.
+	* Added "savelog function to save the logs before going out.
+	* Placing aid debugging functions. All these functions begin with the _
+	  character and are listed with ?libp function.
+	* Added shell script command, ex/NifeDebugTerms, to facilitate
+	  establishment and closing of the display terminals for the logs.
+	* Added the possibility, in graphic mode, to open or close
+	  terminals with keys 'home' and 'end'. These functionalities are
+	  based on performance in the window manager of the above script.
+	* Reorganization of system functions in the function stack.
+	* Improved tasks and consoles.
+	* Added the ability to execute external command interactively, with the
+	  character ! at the beginning of the line.
+
 2014-08-31 - Nife 0.51 is released.
 	* Finalising the version 1.0 of the functions dump and restore with the
 	  definition of the NBLF, Nife Binary Linkable Format.
diff --git a/src/conf.h b/src/conf.h
index a80143a..e22e6c8 100644
--- a/src/conf.h
+++ b/src/conf.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -20,7 +20,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #ifdef HAVE_CONFIG_H
 #include "../config.h"
 #else
-#define VERSION "0.51"
+#define VERSION "0.55"
 #endif
 
 #ifdef HAVE_COMEDILIB_H
diff --git a/src/debug.c b/src/debug.c
index 0d35902..8671974 100644
--- a/src/debug.c
+++ b/src/debug.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -26,27 +26,77 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include "nife.h"
 #include "mth.h"
+#include "foncs.h"
 #include "debug.h"
+#include "stackC.h"
 
 int Debug=1;	/* OK by default */
+int InDebugFct=0;
+
+static void D_Logname(char*B)
+{
+  switch(Debug) {
+   case 1:
+     sprintf(B,".nife_%d.log",getpid());
+     break;
+   case 2:
+     sprintf(B,".nifeNS_%d.log",getpid());
+     break;
+   case 3:
+     sprintf(B,".nifeRPC_%d.log",getpid());
+     break;
+   default:
+     *B='\0';
+  }
+}
 
 void D_Reset(void)
 {
 int fd, nc;
 char NF[24];
-   nc=chdir(".nife"); 
    if (Debug) {
-     sprintf(NF,".nife_%d.log",getpid());
+     nc=chdir(".nife"); 
+     D_Logname(NF);
      if ((fd=open(NF,O_CREAT|O_RDWR|O_TRUNC,0644)) < 0) perror(NF);
      else {
       dup2(fd,2);
       close(fd);
      }
+     nc=chdir("..");
    } else dup2(1,2);
-   nc=chdir("..");
 }
 
-void D_Update(void)
+void IFD_SaveLog(void)
+{
+char NF[24],comm[50],*newf;
+   newf = getString();
+   if (Debug) {
+      D_Logname(NF);
+      sprintf(comm,"cp .nife/%s %s",NF, newf);
+      runCommand(comm);
+   }
+}
+
+static void DebugTerms(char c)
+{
+char comm[24];
+   if (Debug) {
+      sprintf(comm,"ex/NifeDebugTerms -%c", c);
+      runCommand(comm);
+   }
+}
+
+void IFD_DebugTOn(void)
+{
+   DebugTerms('r');
+}
+
+void IFD_DebugTOff(void)
+{
+   DebugTerms('s');
+}
+
+void IFD_Update(void)
 {
    if (Debug) Debug=0;
    else Debug=1;
@@ -56,7 +106,39 @@ void D_Update(void)
 void D_Trace(char * M)
 {
    if (Debug) {
-      fprintf(stderr," %s",M);
+      fprintf(stderr,"%s ",M);
+      fflush(stderr);
+   }
+}
+
+void D_Close(void)
+{
+int nc;
+char NF[24];
+   fclose(stderr);
+   if (Debug) {
+      nc=chdir(".nife"); 
+      D_Logname(NF);
+      unlink(NF);
+      nc=chdir(".."); 
+   }
+}
+
+void D_Tracenl(char * M)
+{
+   if (Debug) {
+      fprintf(stderr,"%s\n",M);
+      fflush(stderr);
+   }
+}
+
+void D_TraceH(char * M, int l)
+{
+int i;
+   if (Debug) {
+      fprintf(stderr,"HEX:");
+      for (i=0;i<l;i++) fprintf(stderr," %x",(int)((unsigned char)M[i]));
+      fprintf(stderr,"\n");
       fflush(stderr);
    }
 }
@@ -65,18 +147,18 @@ static char D_Mes[20];
 void * Malloc(int s)
 {
 void * M;
-    D_Trace("\n");
+    D_Tracenl("EOL");
     M=malloc(s);
-    sprintf(D_Mes,"Malloc %d : %lx\n",s,(long)M);
-    D_Trace(D_Mes);
+    sprintf(D_Mes,"Malloc %d : %lx",s,(long)M);
+    D_Tracenl(D_Mes);
     return M;
 }
 
 void Free(void *A)
 {
-    D_Trace("\n");
-    sprintf(D_Mes,"Free      : %lx\n",(long)A);
-    D_Trace(D_Mes);
+    D_Tracenl("EOL");
+    sprintf(D_Mes,"Free      : %lx",(long)A);
+    D_Tracenl(D_Mes);
     free(A);
 }
 
diff --git a/src/debug.h b/src/debug.h
index c39d367..8c97a72 100644
--- a/src/debug.h
+++ b/src/debug.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,10 +18,21 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #ifndef __NIFE_DEBUG_H__
 #define __NIFE_DEBUG_H__
 extern int Debug;
+extern int InDebugFct;
+
+#define _IFD_BEGIN_ int fd; fd=dup(1); dup2(2,1); InDebugFct=1;
+#define _IFD_END_   dup2(fd,1); close(fd); InDebugFct=0;
 
 extern void D_Reset(void);
-extern void D_Update(void);
+extern void IFD_Update(void);
+extern void IFD_SaveLog(void);
+extern void IFD_DebugTOn(void);
+extern void IFD_DebugTOff(void);
+extern void D_Close(void);
+
 extern void D_Trace(char * M);
+extern void D_Tracenl(char * M);
+extern void D_TraceH(char * M, int l);
 
 extern void * Malloc(int s);
 extern void Free(void * A);
diff --git a/src/dev.c b/src/dev.c
index 72923d8..ec15eae 100644
--- a/src/dev.c
+++ b/src/dev.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -25,6 +25,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include <stdio.h>
 #include <string.h>
+#include "debug.h"
 static int DFL_did=0, DFL_sid=0, DFL_cid=0;
 
 #ifdef _WITH_COMEDILIB
@@ -153,6 +154,13 @@ char driver[24], nomdev[24];
     }
 }
 
+void IFD_listDev (void)
+{
+    _IFD_BEGIN_
+    IF_listDev();
+    _IFD_END_
+}
+
 #ifdef _WITH_COMEDILIB
 static void show_subdev(int i, int V)
 {
@@ -227,6 +235,13 @@ int i, n_subdev;
 #endif
 }
 
+void IFD_showDev (void)
+{
+    _IFD_BEGIN_
+    IF_showDev();
+    _IFD_END_
+}
+
 void IF_devShowDflt (void)
 {
 #ifdef _WITH_COMEDILIB
@@ -246,6 +261,13 @@ int n_subdev;
 #endif
 }
 
+void IFD_devShowDflt (void)
+{
+    _IFD_BEGIN_
+    IF_devShowDflt();
+    _IFD_END_
+}
+
 static void dev_read(int did, int sid, int cid)
 {
 #ifdef _WITH_COMEDILIB
diff --git a/src/dev.h b/src/dev.h
index 1689338..a436444 100644
--- a/src/dev.h
+++ b/src/dev.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -19,11 +19,14 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #define __NIFE_DEV_H__
 
 extern void IF_listDev (void);
+extern void IFD_listDev (void);
 extern void IF_showDev (void);
+extern void IFD_showDev (void);
 extern void IF_devRead (void);
 extern void IF_devWrite (void);
 extern void IF_devDflt (void);
 extern void IF_devShowDflt (void);
+extern void IFD_devShowDflt (void);
 extern void IF_devDflW (void);
 extern void IF_devDflR (void);
 
diff --git a/src/err.c b/src/err.c
index cea7d6d..78805b8 100644
--- a/src/err.c
+++ b/src/err.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -23,6 +23,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "histo.h"
 #include "stackF.h"
 #include "stackN.h"
@@ -132,29 +133,39 @@ void stopErr(char *M, char *F)
     exit(1);
 }
 
+static ErrPrintf(char *M)
+{
+   printf(M);
+   if (InDebugFct==0) fprintf(stderr,M);
+}
+
 static void traiteErr(int n, char * L)
 {
 int v;
     ERROR=n;
     if (D_Cod==0) {
        if (ECHOOFF) printf("\n");
+       /* if (InDebugFct==0) fprintf(stderr,"\n"); A VOIR ! */
        printf("%s : %s !!\a\n",L,TabErr[n]);
+       if (InDebugFct==0) fprintf(stderr,"%s : %s !!\a\n",L,TabErr[n]);
     }
     if (inSonProc) exit(1);
     if (fctEnCours) {
-        if (D_Cod==0) printf("Compilation aborted !\n");
+        if (D_Cod==0) ErrPrintf("Compilation aborted !\n");
         else
-           if (ADDRONE == VIDE) printf("Inside compilation aborted !\n");
+           if (ADDRONE == VIDE) ErrPrintf("Inside compilation aborted !\n");
         _MODIF_fctEnCours_(0);
         rmLastFct();
     }
     if (ADDRONE != VIDE) return;
     if (FD_IN) {
         printf("In loading file %s : line %d !\n", getFDname(),getFDlig());
+        if (InDebugFct==0) fprintf(stderr, "In loading file %s : line %d !\n", getFDname(),getFDlig());
         closeFD();
     }
     if (iTERM) {
       printf("In loading stdin : line %d !\n", getFDlig());
+      if (InDebugFct==0) fprintf(stderr,"In loading stdin : line %d !\n", getFDlig());
       close(FD_IN);  /* pipe ou autre */
       v = dup(iTERM); /* stdin on term */
       iTERM = 0;
@@ -183,8 +194,7 @@ void IF_NoError(void)
 void IF_LibError(void)
 {
 long P;
-   getParLong(&P);
-   putString(TabErr[(int)P]);
+   if (getParLong(&P)) putString(TabErr[(int)P]);
 }
 
 void IF_IsError(void)
diff --git a/src/err.h b/src/err.h
index 7fe67af..f5a013c 100644
--- a/src/err.h
+++ b/src/err.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/ex/NifeDebugTerms b/src/ex/NifeDebugTerms
new file mode 100755
index 0000000..debe504
--- /dev/null
+++ b/src/ex/NifeDebugTerms
@@ -0,0 +1,54 @@
+#! /bin/sh
+# Ce script a ete fait pour l'environnement Gnome,
+# mais il peut etre adapte tres facilement.
+# Pour cela suivre les commentaires.
+
+explic ()
+{
+   echo "Erreur : $1 !" >&2
+   echo "Utilisation : $0 [-s|-r]" >&2
+   echo "   option -s=stopper l'affichage des logs" >&2
+   echo "   option -r=relancer l'affichage des logs" >&2
+   exit 1
+}
+
+TERMCOM='gnome-terminal' # mettre ici le nom de la commande qui va bien !
+
+if ! test $TERMCOM ; then
+   echo "Commande $TERMCOM absente !" >&2
+   exit 1
+fi
+
+
+if [ $# -gt 1 ]; then
+   explic "Parametres trop nombreux"
+fi
+Mode=0
+if [ $# -eq 1 ]; then
+   [ "$1" = "-s" ] && Mode=1
+   [ "$1" = "-r" ] && Mode=2
+   [ $Mode -eq 0 ] && explic "$1 : parametre non valable"
+   # arret des terminaux
+   liste=`ps -fe|grep -v 'sh -c'|grep 'tail -f .nife'|sed 's/  */ /g'|cut -d' ' -f2`
+   for pid in $liste
+   do
+     kill $pid 2>/dev/null
+   done
+   [ $Mode -eq 1 ] && exit 0
+fi
+
+IFS='
+'
+liste=`ls .nife/.nife*` 2>/dev/null
+if [ "$liste" = "" ]; then
+   echo "Pas de fichier log ! Nife n'est pas en action !" >&2
+   exit 2
+fi
+
+for l in $liste
+do
+   com="tail -f $l"
+   $TERMCOM -e "sh -c '$com'" -t "$l" # A mettre a jour si TERMCOM 
+                                      #              a ete modifie !!
+done
+
diff --git a/src/foncs.c b/src/foncs.c
index 585a3f5..444b681 100644
--- a/src/foncs.c
+++ b/src/foncs.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "foncs.h"
 #include "histo.h"
 #include "stackN.h"
@@ -91,7 +92,6 @@ char * Sh;
    if ((pid = fork()) == -1) stopErr("runComm","fork");
    if (pid == 0) { /* fils */
       _MODIF_inSonProc_(1);
-      termReset();
       if ((Sh=getenv("SHELL")) == NULL) execlp("sh","sh","-c",com,NULL);
       else execlp(Sh,"sh","-c",com,NULL);
       perror("sh");
@@ -99,8 +99,12 @@ char * Sh;
    }
    waitpid(pid,NULL,0);
    _MODIF_WAITPID_(0);
-   termInit();
-   printf("\n");
+}
+
+void runCommandT (char * com)
+{
+   D_Trace("$"); D_Tracenl(com);
+   runCommand(com);
 }
 
 void IF_toCsv(void)
diff --git a/src/foncs.h b/src/foncs.h
index ac47186..662f72d 100644
--- a/src/foncs.h
+++ b/src/foncs.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -31,5 +31,6 @@ extern void IF_xytXgraph(void);
 extern void IF_resUsage(void);
 
 extern void runCommand( char * C);
+extern void runCommandT( char * C);
 
 #endif
diff --git a/src/gplot.c b/src/gplot.c
index fb1461d..837e872 100644
--- a/src/gplot.c
+++ b/src/gplot.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -30,6 +30,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "stackN.h"
 #include "stackC.h"
 #include "err.h"
+#include "debug.h"
 
 #define GPO_STD	0	/* standard */
 #define GPO_MRG	0x100	/* merge */
@@ -365,6 +366,11 @@ struct GPlot * N;
     printf("<end of GNUPlot list>\n");
 }
 
-
+void IFD_show_stackGP(void)
+{
+    _IFD_BEGIN_
+    IF_show_stackGP();
+    _IFD_END_
+}
 
 
diff --git a/src/gplot.h b/src/gplot.h
index 9d0d5d8..e2c267e 100644
--- a/src/gplot.h
+++ b/src/gplot.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -27,5 +27,6 @@ extern void IF_gplot_commapp(void);
 extern void IF_gplot_append(void);
 extern void IF_gplot_replace(void);
 extern void IF_show_stackGP(void);
+extern void IFD_show_stackGP(void);
 
 #endif
diff --git a/src/help.c b/src/help.c
index 156df52..55b03ff 100644
--- a/src/help.c
+++ b/src/help.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -19,6 +19,8 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include "help.h"
 #include "nife.h"
+#include "lib.h"
+#include "mth.h"
 
 #define LHLP 200 /* longueur MAX des lignes du fichier hlp */
 static char buf[LHLP];
@@ -59,6 +61,15 @@ int debut=0,l;
 void helpStd(char * L)
 {
     dropTrSuite();
+    if (fctExists(L)==0) {
+       printf("%s is not a User System function !\n",L);
+       return;
+    }
+    if (*L == '_') {
+      printf("%s :\n",L);
+      printf("The same as '%s', but with all displays in the log file.\n", L+1);
+      L++;
+    }
     helpShow(L);
 }
 
diff --git a/src/help.h b/src/help.h
index 393b41f..1a01c2b 100644
--- a/src/help.h
+++ b/src/help.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/histo.c b/src/histo.c
index 63a53fb..0d91888 100644
--- a/src/histo.c
+++ b/src/histo.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -80,6 +80,11 @@ void closeFD(void)
    else _MODIF_FD_IN_(0);
 }
 
+int getiFD(void)
+{
+    return iFD;
+}
+
 int getFDlig(void)
 {
     return FD_L[iFD];
@@ -207,6 +212,7 @@ int lireLigne(int fd, char *b, char *s, int nc)
 char *d, *f, c, c2, c3, *h, *w, *Wl, *rac;
 int n, i, l, ls=0, ins=0, ignTild=0, nbT=0, Nc;
 unsigned int j;
+char bufd[50];
    /* printf("lireLigne ... \n"); */
    d = b;
    f = b+nc;
@@ -333,7 +339,7 @@ unsigned int j;
               ignTild=1;
               Nc=read(fd,&c2,1);
               Nc=read(fd,&c3,1);
-              if (c2 == '[') {
+              if (c2 == '[') { /* CSI - see XTerm Control Sequences */
                   switch(c3) {
                       case '2' : /* Insert */
                         if (ins) {
@@ -350,8 +356,8 @@ unsigned int j;
                            fflush(stdout);
                         }
                         break; 
-                      case 'A' :
-                      case 'B' :
+                      case 'A' : /* UpArrow */
+                      case 'B' : /* DownArrow */
                         ins = 0;
                         /* efface la ligne en cours */
                         l=d-b;
@@ -395,14 +401,24 @@ unsigned int j;
                            fflush(stdout);
                         }
                         break; 
+                      case 'H' : /* home : debug terms ON */
+                      case '1' : /* home numeric */
+                        IFD_DebugTOn();
+                        break; 
+                      case 'F' : /* end : debug terms OFF */
+                      case '4' : /* end numeric */
+                        IFD_DebugTOff();
+                        break; 
                       default:
-                        printf("\nESC [ %d (%c) !\n",(int)c3, c3);
+                        sprintf(bufd,"# ignore : ESC [ %d (%c) !",(int)c3, c3);
+                        D_Tracenl(bufd);
                         *d='\0';
+                        /* **************
                         printf("> %s",b);
-                        fflush(stdout);
+                        fflush(stdout); */
                   }
               } else {
-                 if (c2 == 'O') {
+                 if (c2 == 'O') { /* SS3 - see XTerm Control Sequences */
                     switch(c3) {
                       case 'P' : /* F1 */
                       break; 
@@ -412,12 +428,20 @@ unsigned int j;
                       break; 
                       case 'S' : /* F4 */
                       break; 
+                      case 'H' : /* home : debug terms ON */
+                        IFD_DebugTOn();
+                        break; 
+                      case 'F' : /* end : debug terms OFF */
+                        IFD_DebugTOff();
+                        break; 
                     }
                  } else {
-                  printf("\nESC %d %d (%c) !\n",(int)c2,(int)c3, c3);
+                  sprintf(bufd,"# ignore : ESC %d %d (%c) !",(int)c2,(int)c3, c3);
+                  D_Tracenl(bufd);
                   *d='\0';
+                  /* **************
                   printf("> %s",b);
-                  fflush(stdout);
+                  fflush(stdout); */
                  }
               }
               break; 
diff --git a/src/histo.h b/src/histo.h
index f66be51..df7b452 100644
--- a/src/histo.h
+++ b/src/histo.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -23,6 +23,7 @@ extern int iTERM;
 extern void IF_showFD(void);
 extern void addFD(int fd, char *N);
 extern void closeFD(void);
+extern int getiFD(void);
 extern int getFDlig(void);
 extern char * getFDname(void);
 extern int lireLigne(int fd, char * buf, char * buf2, int max);
diff --git a/src/i2c.c b/src/i2c.c
index bae5175..21c036a 100644
--- a/src/i2c.c
+++ b/src/i2c.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -237,6 +237,7 @@ unsigned long funcs;
 #include "stackN.h"
 #include "i2c.h"
 #include "err.h"
+#include "debug.h"
 
 void IF_listI2C (void)
 {
@@ -247,6 +248,13 @@ void IF_listI2C (void)
 #endif
 }
 
+void IFD_listI2C (void)
+{
+    _IFD_BEGIN_
+    IF_listI2C();
+    _IFD_END_
+}
+
 void IF_showI2C (void)
 {
 long n;
@@ -275,6 +283,13 @@ char Bus[10], filename[20];
 #endif
 }
 
+void IFD_showI2C (void)
+{
+    _IFD_BEGIN_
+    IF_showI2C();
+    _IFD_END_
+}
+
 static void i2c_read(int id, int add, int off)
 {
 #ifdef _WITH_I2C
diff --git a/src/i2c.h b/src/i2c.h
index b77cd4d..c1a5a96 100644
--- a/src/i2c.h
+++ b/src/i2c.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -19,7 +19,9 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #define __NIFE_I2C_H__
 
 extern void IF_listI2C (void);
+extern void IFD_listI2C (void);
 extern void IF_showI2C (void);
+extern void IFD_showI2C (void);
 extern void IF_I2CRead (void);
 extern void IF_I2CWrite (void);
 
diff --git a/src/lib.c b/src/lib.c
index bb4cad3..e2610a3 100644
--- a/src/lib.c
+++ b/src/lib.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -344,9 +344,12 @@ void initLib(void)
     addFonE("del_ofunc",IF_delOFct, F_PROG);
     addFonE("fscan",IF_scanFct, F_PROG);
     addFonc("?cs",IF_show_stackC);
+    addFonP("_?cs",IFD_show_stackC);
     addFonP("?f",IF_show_stackF);
-    /* addFonP("?l",IF_showFD); for debugging */
+    addFonP("_?f",IFD_show_stackF);
+    /* addFonP("?l",IF_showFD); for internal debugging */
     addFonP("?v",IF_show_stackV);
+    addFonP("_?v",IFD_show_stackV);
     addFonE("del_var",IF_delVar,F_PROG);
     addFonP("vdrop",rmLastVar);
     addFonP("reset_var",IF_setVarI);
@@ -363,8 +366,10 @@ void initLib(void)
     addFonP("df_stop",IF_DF_STOP);
 ****************/
     addFonc("?ls",IF_show_stackL);
+    addFonP("_?ls",IFD_show_stackL);
     addFonc("?s",IF_show_stack);
-    /* addFonc("?libX",show_lib_addr); for debugging */
+    addFonP("_?s",IFD_show_stack);
+    /* addFonc("?libX",show_lib_addr); for internal debugging */
     addFonc("?libs",IF_show_liball);
     addFonc("?lib",IF_show_libstd);
     addFonc("?libM",IF_show_libmath);
@@ -387,7 +392,9 @@ void initLib(void)
     addFonc("BIN",IF_BIN);
     addFonc("echo_on",IF_ECHOON);
     addFonc("echo_off",IF_ECHOFF);
-    addFonc("DEBUG_I/O",D_Update);
+    addFonP("DEBUG_I/O",IFD_Update);
+    addFonP("\"saveLog",IFD_SaveLog);
+    /* addFonP("?logs",IFD_DebugTOn); */
     addFonc("NBTAB",IF_NBTAB);
     addFonc("NBLIG",IF_NBLIG);
     addFonE("Var",IF_debVar, F_PROG);
@@ -396,6 +403,7 @@ void initLib(void)
     addFonP("var_up",IF_VARUP);
     addFonP("var_down",IF_VARDOWN);
     addFonc("?vars",IF_vars);
+    addFonP("_?vars",IFD_vars);
     addFonc("drop",IF_drop);
     addFonc("dup",IF_dup);
     addFonc("swap",IF_swap);
@@ -460,6 +468,7 @@ void initLib(void)
     addFonG("xy_xgraph",IF_xyXgraph);
     addFonG("xyt_xgraph",IF_xytXgraph);
     addFonG("?gp",IF_show_stackGP);
+    addFonP("_?gp",IFD_show_stackGP);
     addFonG("gplot",IF_gplot_new);
     addFonG("gplotM",IF_gplot_newM);
     addFonG("gplotRaz",IF_delAllGP);
@@ -472,6 +481,7 @@ void initLib(void)
     addFonP(":!",IF_debFctS);
     addFonP("Task",IF_NewTask);
     addFonP("?t",IF_show_Tasks);
+    addFonP("_?t",IFD_show_Tasks);
     addFonP("?task_run",IF_statusTask);
     addFonP("del_task",IF_delTask);
     addFonP("\"f",IF_execCS);
@@ -480,6 +490,7 @@ void initLib(void)
     addFonP("\"v?",IF_execCSvl);
     addFonP("stop_task",IF_stopTask);
     addFonP("?console",IF_showCons);
+    addFonP("_?console",IFD_showCons);
     addInst(";",IF_finFct);
     addInst("'",IF_debBackC);
     addInst("`",IF_debBackC1);
@@ -496,7 +507,7 @@ void initLib(void)
     addFonc("do_leave",IF_DO_Leave);
     addFonc("*do_leave",IF_DO_MLeave);
     addFonc("do_next",IF_DO_Next);
-    /* addFonc("?do",IF_DO_Show); for debugging */
+    /* addFonc("?do",IF_DO_Show); for internal debugging */
     addFonc("ndo",IF_nDO);
     addInst("loop",IF_LOOP);
     addInst("+loop",IF_PLOOP);
@@ -510,18 +521,24 @@ void initLib(void)
     addInst("goto_end",IF_JEND);
     addFonE("help",IF_help, F_CORE);
     addFonD("?dev",IF_listDev);
+    addFonP("_?dev",IFD_listDev);
     addFonD("dev_info",IF_showDev);
+    addFonP("_dev_info",IFD_showDev);
     addFonD("dev_read",IF_devRead);
     addFonD("dev_write",IF_devWrite);
     addFonD("dev_dflt",IF_devDflt);
     addFonD("?dev_dflt",IF_devShowDflt);
+    addFonP("_?dev_dflt",IFD_devShowDflt);
     addFonD("dev_dflW",IF_devDflW);
     addFonD("dev_dflR",IF_devDflR);
     addFonD("?i2c",IF_listI2C);
+    addFonP("_?i2c",IFD_listI2C);
     addFonD("i2c_info",IF_showI2C);
+    addFonP("_i2c_info",IFD_showI2C);
     addFonD("i2c_read",IF_I2CRead);
     addFonD("i2c_write",IF_I2CWrite);
     addFonN("?n",IF_netList);
+    addFonP("_?n",IFD_netList);
     addFonN("netOn",IF_netOn);
     addFonN("netOff",IF_netOff);
     addFonN("netDt>",IF_netDt);
@@ -535,12 +552,22 @@ void initLib(void)
     addFonN("NetErr",IF_NetErrVal);
     addFonN("Me",IF_Me);
     addFonN("?ns",IF_netStackList);
+    addFonP("_?ns",IFD_netStackList);
     addFonN(">net",IF_netU2S);
     addFonN("net>",IF_netS2U);
     addFonN("ndrop",IF_netDropS);
     /* triList(); */
 }
 
+int fctExists(char * L)
+{
+int i;
+    for (i=0;i<NBFonc;i++) {
+        if (strcmp(L,Fonctions[i].nam) == 0) return 1;
+    }
+    return 0;
+}
+
 void * libByName(char * L)
 {
 int i;
@@ -552,6 +579,7 @@ int i;
     }
     return VIDE;
 }
+
 void * libByInd(long i)
 {
     return((void*)Fonctions[i].fct);
@@ -588,7 +616,7 @@ int i;
 void * A;
 short T=0;
     InExec = C;
-    D_Trace(C);
+    /* D_Trace(C); pas pour le moment */
     if (sigsetjmp(ENV_INT,1)) {
        interInfos("execLib",C);
        return 1;
diff --git a/src/lib.h b/src/lib.h
index 4ce493b..7fa4af7 100644
--- a/src/lib.h
+++ b/src/lib.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -24,6 +24,8 @@ extern int InstallOn;
 extern void initLib(void);
 extern int execLibNrpc(char * C);
 extern int execLib(char * C);
+extern int fctExists(char *);
+extern void * libByName(char *);
 extern void * libByInd(long i);
 extern char * libByAddr(void *A);
 extern long  iLibByAddr(void *A);
diff --git a/src/libmath.c b/src/libmath.c
index bf3f6cd..c7deec1 100644
--- a/src/libmath.c
+++ b/src/libmath.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/libmath.h b/src/libmath.h
index 56dd0ce..4cf4436 100644
--- a/src/libmath.h
+++ b/src/libmath.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/libmathc99.c b/src/libmathc99.c
index e0b5bea..87f82b9 100644
--- a/src/libmathc99.c
+++ b/src/libmathc99.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/mth.c b/src/mth.c
index 2818d66..c77cc4d 100644
--- a/src/mth.c
+++ b/src/mth.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/mth.h b/src/mth.h
index 6fb53db..d677719 100644
--- a/src/mth.h
+++ b/src/mth.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/net.c b/src/net.c
index 21b689a..8f08497 100644
--- a/src/net.c
+++ b/src/net.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -447,10 +447,11 @@ uint32_t k;
 char *sF, nF[30];
    i=readMess(s);
    NET_BUF[i]='\0';
-   /* D_Trace(NET_BUF); */
+   D_TraceH(NET_BUF,i); /* to debug */
    switch(*NET_BUF) {
      case NET_OFF :
        send1car(s, NET_OFF+1);
+       D_Close();
        exit(0); /* stop the Nrpc client */
        break;
      case NET_EXE :
@@ -498,7 +499,7 @@ char c, *sN, *sF;
 
    i=readMess(s);
    NET_BUF[i]='\0';
-   /* D_Trace(NET_BUF); */
+   D_TraceH(NET_BUF,i); /* for debug */
    switch(*NET_BUF) {
      case NET_ONR :
        CalDT=1;
@@ -536,7 +537,10 @@ char c, *sN, *sF;
        delCli(M1.pid, Sin.sin_addr);
        send1car(s, NET_OFF+1);
        if (STS) {
-          if (NCli == 0) exit(0); /* stop the server */
+          if (NCli == 0) {
+             D_Close();
+             exit(0); /* stop the server */
+          }
           STS=0;
        }
        break;
@@ -683,13 +687,19 @@ static int connSock(void)
    return 0; /* OK */
 }
 
+static void InterruptRpc(int S)
+{
+   D_Close();
+   exit(0);
+}
+
 void main_Nrpc(void) /* main function for Nrpc client */ 
 {
 int sock, nsock;
 socklen_t ln;
 struct sockaddr_in Nsin;
 
-    signal(SIGTERM, SIG_DFL);
+    signal(SIGTERM, InterruptRpc);
     if ((sock = socket(AF_INET, SOCK_STREAM,  IPPROTO_TCP)) < 0)
        stopServ(0, "socket",1); 
     bzero(&Nsin,sizeof(Nsin));
@@ -725,6 +735,7 @@ static void startNrpc(void)
        close(0);
        close(1);
        /* close(2); */
+       if (Debug) Debug=3;
        D_Reset();
        IF_stack_clear(); /* clear all stacks */
        IF_stackL_clear();
@@ -763,6 +774,7 @@ int pid;
        close(0);
        close(1);
        /* close(2); */
+       if (Debug) Debug=2;
        D_Reset();
        close(Sock);
        IF_stack_clear(); /* clear all stacks */
@@ -933,6 +945,13 @@ void IF_netList (void)
    printf("<end of net list>\n");
 }
 
+void IFD_netList (void)
+{
+    _IFD_BEGIN_
+    IF_netList();
+    _IFD_END_
+}
+
 void IF_netStackList (void)
 {
    if (NET) {
@@ -943,7 +962,13 @@ void IF_netStackList (void)
      readAff(Sock, NET_SLI+1);
      close(Sock);
    } 
-   /* printf("<end of net stack>\n"); */
+}
+
+void IFD_netStackList (void)
+{
+    _IFD_BEGIN_
+    IF_netStackList();
+    _IFD_END_
 }
 
 void IF_netDropS (void)
diff --git a/src/net.h b/src/net.h
index 4798e5d..473f980 100644
--- a/src/net.h
+++ b/src/net.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -31,10 +31,12 @@ extern void IF_netOff(void);
 extern void IF_netDt(void);
 extern void IF_netDepth(void);
 extern void IF_netList(void);
+extern void IFD_netList(void);
 extern void IF_netStopS(void);
 extern void IF_netDropS(void);
 extern void IF_netRusage (void);
 extern void IF_netStackList (void);
+extern void IFD_netStackList (void);
 extern void IF_netU2S (void);
 extern void IF_netS2U (void);
 extern void IF_netExec (void);
diff --git a/src/nife.c b/src/nife.c
index e7b91fa..459f8a1 100644
--- a/src/nife.c
+++ b/src/nife.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -112,7 +112,7 @@ char Lib[8];
 #ifdef _MULTI_THREADING_
     strcpy(Lib,"mt-");
 #endif
-    printf("nife (Networking Industrial Forth-like Environment) - version %s%s-%ld/%ld\n\t (c) S.E.R.I.A.N.E. 2009-2014\n",Lib,VERSION,sizeof(long)*8,sizeof(double)*8);
+    printf("nife (Networking Industrial Forth-like Environment) - version %s%s-%ld/%ld\n\t (c) S.E.R.I.A.N.E. 2009-2015\n",Lib,VERSION,sizeof(long)*8,sizeof(double)*8);
 }
 
 int isSepa(char c, int m)
@@ -144,13 +144,32 @@ PFC tS;
     return Err;
 }
 
-static void traiteLigne(char *b)
+static void traiteLigne(char *b, int Ctx)
 {
 char *mot, *d, *f, *w;
+   /* case of sh command : ! */
+   if (*b=='!') {
+     runCommandT(b+1);
+     return;
+   }
    d=b; f=b+strlen(d);
 #ifdef DEBUG
      printf("traiteLigne : <%s>\n",d);
 #endif
+   switch(Ctx) {
+     case 1 : /* compileFile */
+       D_Trace(" #");
+       break;
+     case 2 : /* IF_ExecCS */
+       D_Trace("# ExecCS:");
+       break;
+     case 3 : /* makeFunction */
+       D_Trace("# makeFunction:");
+       break;
+     default : /* 0 */
+       if (getiFD()) D_Trace(" #");
+   }
+   D_Tracenl(b);
    while (d<f) {
        if (noErr()) break;
        /* recherche du 1er mot */
@@ -199,7 +218,7 @@ int i=0;
              printf("In file %s line %d !\n",f,i);
              break;
           }
-          traiteLigne(bufP);
+          traiteLigne(bufP,1);
           i++;
        }
        fclose(F);
@@ -361,7 +380,7 @@ void IF_ExecCS(void)
 char * f;
     f = getString();
     if (f != NULL) {
-       if (strlen(f)>0) traiteLigne(f);
+       if (strlen(f)>0) traiteLigne(f,2);
        free((void*)f);
     }
 }
@@ -371,7 +390,7 @@ void * makeFunction(char * f)
 void *M;
    if ((M = malloc(strlen(f)+8)) == NULL) stopErr("makeFunction","malloc");
    sprintf((char*)M,": _f %s ;",f);
-   traiteLigne((char*)M);
+   traiteLigne((char*)M,3);
    free(M);
    if (noErr() == 0) {
        M = fctByName("_f");
@@ -414,7 +433,7 @@ void IF_Load(void)
 
 int main(int N, char *P[])
 {
-int n;
+int n,Ctx;
 char *dirW = ".nife";
     if (N > 2) {
        fprintf(stderr,"nife [nif-file]\n");
@@ -463,16 +482,18 @@ char *dirW = ".nife";
        if ((FD_IN+iTERM) == 0) {
           printf("> ");
           fflush(stdout);
-       }
+          Ctx=0;
+       } else Ctx=1;
        razErr();
        if ((n=lireLigne(FD_IN,bufP,bufP2,LBUF)) == -1)
                  printf("Line too long!\n");
        else
-          if (n>0) traiteLigne(bufP);
+          if (n>0) traiteLigne(bufP,0);
     }
     IF_delAllGP();
     IF_netStopS();
     IF_netOff();
+    D_Close();
     termReset();
     printf("Bye !\n");
     return 0;
diff --git a/src/nife.h b/src/nife.h
index e55b974..375f8ee 100644
--- a/src/nife.h
+++ b/src/nife.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/scs.c b/src/scs.c
index 0dc04b2..a13a664 100644
--- a/src/scs.c
+++ b/src/scs.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/scs.h b/src/scs.h
index 03dc698..52a2a35 100644
--- a/src/scs.h
+++ b/src/scs.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
diff --git a/src/stackC.c b/src/stackC.c
index 2c82fb0..6481828 100644
--- a/src/stackC.c
+++ b/src/stackC.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -24,6 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "stackC.h"
 #include "stackF.h"
 
@@ -212,6 +213,12 @@ char s;
     } else printf("<end of character stack>\n");
 }
 
+void IFD_show_stackC(void)
+{
+    _IFD_BEGIN_
+    IF_show_stackC();
+    _IFD_END_
+}
 
 void suiteString(char *S)
 {
diff --git a/src/stackC.h b/src/stackC.h
index 914e615..c766242 100644
--- a/src/stackC.h
+++ b/src/stackC.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -33,6 +33,7 @@ extern void IF_typeC(void);
 extern void IF_timeC(void);
 extern void IF_dateC(void);
 extern void IF_show_stackC(void);
+extern void IFD_show_stackC(void);
 extern void IF_debString(void);
 
 extern void dump_eltC(int fd, char*A);
diff --git a/src/stackF.c b/src/stackF.c
index 6914222..7116a08 100644
--- a/src/stackF.c
+++ b/src/stackF.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -24,6 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "lib.h"
 #include "stackF.h"
 #include "stackN.h"
@@ -216,6 +217,39 @@ struct Fct *Elt;
    return Elt;
 }
 
+void replaceFctS(void)
+{
+void * Next, * Next2;
+struct Fct *Elt, *N, *N2;
+   if (stackF != VIDE) {
+      Elt = (struct Fct *)stackF;
+      if (Elt->n == VIDE) return;
+      Next = Elt->n;
+      N = (struct Fct*) Next;
+      if (N->typ) return;
+      stackF = Elt->n;
+      Elt->n = VIDE;
+      while (Next != VIDE) {
+         N = (struct Fct*) Next;
+         Next2 = N->n;
+         if (Next2==VIDE) {
+            N->n = (void*)Elt;
+            return;
+         } else {
+            N2 = (struct Fct*) Next2;
+            if (N2->typ) {
+               Elt->n = Next2;
+               N->n = (void*)Elt;
+               return;
+            }
+         }
+         Next = N->n;
+      }
+   }
+   else messErr(7);
+   return;
+}
+
 void IF_show_stackF(void)
 {
 void * Next;
@@ -231,6 +265,13 @@ char Ctyp;
     printf("<end of functions stack>\n");
 }
 
+void IFD_show_stackF(void)
+{
+    _IFD_BEGIN_
+    IF_show_stackF();
+    _IFD_END_
+}
+
 static char cod[MAXCODE];
 static int i_cod;
 /* pile pour IF ELSE THEN */
@@ -313,6 +354,7 @@ int i,l, *ea, *Ea;
    if (F->typ) {
       F->typ=2;
       addFonU(F->l,M);
+      replaceFctS();
    }
    /* printf("Total Fct : %d + %d !\n",i_cod,(3*sizeof(int))); */
    _MODIF_fctEnCours_(0);
@@ -477,10 +519,12 @@ char Lib[LDFLT+1];
     i_adB = 0;
     i_adD = 0;
 }
+
 static void newFct0(char * S)
 {
     newFct2(S,0);
 }
+
 static void newFct1(char * S)
 {
     newFct2(S,1);
@@ -565,6 +609,9 @@ struct Fct * FR;
           }  else {
              printf("Called in %s err=%d i=%d/%d cod=<%x>\n",
                     codByAddr(A),noErr(),(int)(C-D),i,*C);
+             if (InDebugFct==0) fprintf(stderr,
+                    "Called in %s err=%d i=%d/%d cod=<%x>\n",
+                    codByAddr(A),noErr(),(int)(C-D),i,*C);
              break; /* end of while */
           }
        }
@@ -1293,10 +1340,12 @@ void IF_delFct(void)
 {
    putTrSuite(rmFct);
 }
+
 void IF_delAFct(void)
 {
    putTrSuite(rmAFct);
 }
+
 void IF_delOFct(void)
 {
    putTrSuite(rmOFct);
diff --git a/src/stackF.h b/src/stackF.h
index 509d5ef..c8e8932 100644
--- a/src/stackF.h
+++ b/src/stackF.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -65,6 +65,7 @@ typedef unsigned char Code;
 
 extern int D_Cod;
 extern void IF_show_stackF(void);
+extern void IFD_show_stackF(void);
 extern void IF_debFct(void);
 extern void IF_debFctS(void);
 extern void IF_finFct(void);
diff --git a/src/stackL.c b/src/stackL.c
index 218d274..092f227 100644
--- a/src/stackL.c
+++ b/src/stackL.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "stackL.h"
 
 
@@ -178,6 +179,12 @@ char s;
     } else printf("<end of logical stack>\n");
 }
 
+void IFD_show_stackL(void)
+{
+    _IFD_BEGIN_
+    IF_show_stackL();
+    _IFD_END_
+}
 
 void dump_stackL(int fd)
 {
diff --git a/src/stackL.h b/src/stackL.h
index addf4b0..8c3601e 100644
--- a/src/stackL.h
+++ b/src/stackL.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -36,6 +36,7 @@ extern void IF_xorL(void);
 extern void IF_true(void);
 extern void IF_false(void);
 extern void IF_show_stackL(void);
+extern void IFD_show_stackL(void);
 
 extern void dump_stackL(int fd);
 extern void restore_stackL(int fd);
diff --git a/src/stackN.c b/src/stackN.c
index 2a3e93a..3b06486 100644
--- a/src/stackN.c
+++ b/src/stackN.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -89,6 +89,13 @@ char * L;
     printf("\nNBTAB=%d\nNBLIG=%d\n",NBTAB,NBLIG);
 }
 
+void IFD_vars(void)
+{
+    _IFD_BEGIN_
+    IF_vars();
+    _IFD_END_
+}
+
 void IF_REAL(void) { _MODIF_DOUBLE_(1); }
 void IF_INTEGER(void) { _MODIF_DOUBLE_(0); }
 
@@ -452,6 +459,13 @@ char s;
     }
 }
 
+void IFD_show_stack(void)
+{
+    _IFD_BEGIN_
+    IF_show_stack();
+    _IFD_END_
+}
+
 void IF_point(void)
 {
 struct Num *Elt;
diff --git a/src/stackN.h b/src/stackN.h
index 790d2ca..82c87af 100644
--- a/src/stackN.h
+++ b/src/stackN.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -37,6 +37,7 @@ extern void printNumber(void * N);
 extern void numVarOff(void * N);
 extern void * duplicateNum(void * S, int vSoff);
 extern void IF_show_stack(void);
+extern void IFD_show_stack(void);
 extern void IF_ramp(void);
 extern void IF_dramp(void);
 extern void IF_DEC(void);
@@ -53,6 +54,7 @@ extern void IF_VAROFF(void);
 extern void IF_VARUP(void);
 extern void IF_VARDOWN(void);
 extern void IF_vars(void);
+extern void IFD_vars(void);
 extern void IF_point(void);
 extern void IF_swap(void);
 extern void IF_dup(void);
diff --git a/src/stackV.c b/src/stackV.c
index d5982dc..2a869c1 100644
--- a/src/stackV.c
+++ b/src/stackV.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -24,6 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "lib.h"
 #include "stackV.h"
 #include "stackF.h"
@@ -163,6 +164,13 @@ struct Var * N;
     printf("<end of variables stack>\n");
 }
 
+void IFD_show_stackV(void)
+{
+    _IFD_BEGIN_
+    IF_show_stackV();
+    _IFD_END_
+}
+
 static void newVar(char * S)
 {
 char Lib[LDFLT+1];
diff --git a/src/stackV.h b/src/stackV.h
index f6dd47d..a323d4d 100644
--- a/src/stackV.h
+++ b/src/stackV.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 extern void IF_debVar(void);
 extern void IF_debVarCS(void);
 extern void IF_show_stackV(void);
+extern void IFD_show_stackV(void);
 extern void IF_delVar(void);
 extern void dump_stackV(int fd);
 extern void restore_stackV(int fd);
diff --git a/src/tasks.c b/src/tasks.c
index 7ae0095..9b4fd46 100644
--- a/src/tasks.c
+++ b/src/tasks.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -18,6 +18,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <time.h>
 #include <signal.h>
@@ -31,6 +32,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>
 #include "nife.h"
 #include "mth.h"
 #include "err.h"
+#include "debug.h"
 #include "tasks.h"
 #include "foncs.h"
 #include "histo.h"
@@ -64,15 +66,18 @@ static char * FicCons(int t)
 
 int MakeTask (void * A)
 {
-int i, pid;
-char * NF;
+int i, n, pid;
+char * NF, buf[50];
       i = FctInTask-1;
       if ((pid = fork()) == -1) stopErr("IF_NewTask","fork");
       if (pid == 0) { /* fils */
-         ITASK=FctInTask;  /* TASK 0 is the interractive */
+         ITASK=FctInTask;  /* TASK 0 is the interractive one */
          NF = FicCons(ITASK);
+         n = i+1;
          if ((i=open(NF,O_CREAT|O_RDWR|O_TRUNC,0600)) < 0) perror(NF);
          else {
+            sprintf(buf,"Task #%d console :\n",n);
+            write(i,buf,strlen(buf));
             dup2(i,1);
             dup2(i,2);
             close(i);
@@ -101,6 +106,13 @@ int i;
    printf("<end of tasks list>\n");
 }
 
+void IFD_show_Tasks(void)
+{
+    _IFD_BEGIN_
+    IF_show_Tasks();
+    _IFD_END_
+}
+
 void IF_statusTask(void)
 {
 long V;
@@ -148,7 +160,7 @@ int i;
    }
 }
 
-void IF_showCons( void)
+void IF_showCons(void)
 {
 long V;
 int i;
@@ -164,4 +176,10 @@ char * NF, comm[30];
    }
 }
 
+void IFD_showCons(void)
+{
+    _IFD_BEGIN_
+    IF_showCons();
+    _IFD_END_
+}
 
diff --git a/src/tasks.h b/src/tasks.h
index 7f3e251..ec0c23d 100644
--- a/src/tasks.h
+++ b/src/tasks.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2011-2014  Patrick H. E. Foubet - S.E.R.I.A.N.E.
+/* Copyright (C) 2011-2015  Patrick H. E. Foubet - S.E.R.I.A.N.E.
 
 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -22,10 +22,12 @@ extern int ITASK;
 
 extern void IF_NewTask(void);
 extern void IF_show_Tasks(void);
+extern void IFD_show_Tasks(void);
 extern void IF_statusTask(void);
 extern void IF_stopTask(void);
 extern void IF_delTask(void);
 extern void IF_showCons(void);
+extern void IFD_showCons(void);
 
 extern int MakeTask(void * A);