--- rpl/src/instructions_s1.c	2016/03/09 10:57:41	1.82
+++ rpl/src/instructions_s1.c	2016/03/09 22:11:27	1.84
@@ -3691,11 +3691,6 @@ instruction_syseval(struct_processus *s_
 		verrouillage_threads_concurrents(s_etat_processus);
 		pid = fork();
 
-		if (pid > 0)
-		{
-			deverrouillage_threads_concurrents(s_etat_processus);
-		}
-
 		if (pid < 0)
 		{
 			if (close(pipes_entree[0]) != 0)
@@ -3739,6 +3734,8 @@ instruction_syseval(struct_processus *s_
 		}
 		else if (pid == 0)
 		{
+			(*s_etat_processus).erreur_systeme = d_es;
+
 			if (close(pipes_entree[1]) != 0)
 			{
 				(*s_etat_processus).erreur_systeme = d_es_processus;
@@ -3824,6 +3821,8 @@ instruction_syseval(struct_processus *s_
 		}
 		else
 		{
+			deverrouillage_threads_concurrents(s_etat_processus);
+
 			if (close(pipes_entree[0]) != 0)
 			{
 				(*s_etat_processus).erreur_systeme = d_es_processus;