diff --git a/launch.py b/launch.py
index 98ba0301f2b4469a40588cfda704391e992bfe2c..126e45da4b30127c8c71ffbc9212b6516392be9f 100755
--- a/launch.py
+++ b/launch.py
@@ -348,7 +348,13 @@ class LaunchJob(ParametricJob):
         pin.write(b'else:\n')
         pin.write(('\tprint ("metafor dir %s not found!")\n'%mtfdir).encode('utf-8'))
         pin.write(b'\tsys.exit()\n\n')
-        pin.write(('exec(open(r"%s").read())\n'%os.path.join(mtfdir,'.pythonrc.py')).encode('utf-8'))
+        # .pythonrc.py 
+        # __file__ has to be defined (with absPath) to execute .pythonc.py 
+        # + propre comme ca & donne un traceback quand ca va pas ... (thnks robo)
+        pin.write(('rcfile = r"%s"\n'%os.path.join(mtfdir,'.pythonrc.py')).encode('utf-8'))
+        pin.write(('script = open(rcfile, encoding="utf-8").read()\n').encode('utf-8'))
+        pin.write(('exec(compile(script, rcfile, "exec"),{"__file__":rcfile})\n').encode('utf-8'))
+        # battery
         pin.write(b'import toolbox.battery as b\n')
         pin.write(b'battery = b.Battery() \n')
         pin.write(b'battery.keepFacs = True\n')