diff --git a/gestion/gest_crans.py b/gestion/gest_crans.py
index 6531ee5e..09862f4b 100755
--- a/gestion/gest_crans.py
+++ b/gestion/gest_crans.py
@@ -1113,7 +1113,7 @@ def del_machine(machine) :
 	machine.delete(res[0])
     except EnvironmentError, c :
 	arg = u'--title "Destruction machine" '
-	arg+= u'--msgbox "%s\n\n\n" 0 0' % c.args[0]
+	arg+= u'--msgbox "ERREUR n°%s\n\n\n" 0 0' % c.args[0]
 	dialog(arg)
 	return 1
 	
diff --git a/gestion/lock.py b/gestion/lock.py
index baa360aa..ba155afd 100755
--- a/gestion/lock.py
+++ b/gestion/lock.py
@@ -20,7 +20,7 @@ def wait_lock(lock_name, lock_comment='', d=None):
     """
     from twisted.internet import reactor, defer
     try:
-        make_lock(lock_name, lock_comment, quiet=True)
+        make_lock(lock_name, lock_comment, nowait=1, quiet=True)
         # On a le lock
         if not d:
             # On est en mode synchrone
@@ -36,7 +36,7 @@ def wait_lock(lock_name, lock_comment='', d=None):
         reactor.callLater(0.2, wait_lock, lock_name, lock_comment, d)
         return d
 
-def make_lock(lock_name, lock_comment='',nowait=1, quiet=False) :
+def make_lock(lock_name, lock_comment='',nowait=0, quiet=False) :
     """ Création d'un lock 
     si nowait=1 fait un sys.exit(254) quand un ancien lock actif est rencontré
     """
@@ -53,7 +53,7 @@ def make_lock(lock_name, lock_comment='',nowait=1, quiet=False) :
     try:
         lockf(lock_fd_dl, LOCK_EX | LOCK_NB)
     except IOError, e:
-        if e.errno not in [errno.EACCESS, errno.EAGAIN]:
+        if e.errno not in [errno.EACCES, errno.EAGAIN]:
             raise
         if nowait:
             if quiet: