--- rpl/src/instructions_o1.c	2012/07/03 12:49:55	1.57
+++ rpl/src/instructions_o1.c	2013/02/26 19:56:15	1.63
@@ -1,7 +1,7 @@
 /*
 ================================================================================
-  RPL/2 (R) version 4.1.9
-  Copyright (C) 1989-2012 Dr. BERTRAND Joël
+  RPL/2 (R) version 4.1.12
+  Copyright (C) 1989-2013 Dr. BERTRAND Joël
 
   This file is part of RPL/2.
 
@@ -4735,18 +4735,22 @@ instruction_open(struct_processus *s_eta
 				if (strcmp(protocole_socket, "IPV4") == 0)
 				{
 					protocole_socket[2] = d_code_fin_chaine;
+					protocole_numerique = 0;
 				}
-
-				if ((s_protocole = getprotobyname(protocole_socket)) == NULL)
+				else
 				{
-					liberation(s_etat_processus, s_objet_argument);
+					if ((s_protocole = getprotobyname(protocole_socket))
+							== NULL)
+					{
+						liberation(s_etat_processus, s_objet_argument);
 
-					(*s_etat_processus).erreur_execution =
-							d_ex_erreur_parametre_fichier;
-					return;
-				}
+						(*s_etat_processus).erreur_execution =
+								d_ex_erreur_parametre_fichier;
+						return;
+					}
 
-				protocole_numerique = (*s_protocole).p_proto;
+					protocole_numerique = (*s_protocole).p_proto;
+				}
 			}
 
 			if ((s_objet_resultat = allocation(s_etat_processus, SCK))