Fix error message for opt object

pym/cl_opt.py

@@ -292,7 +292,9 @@ class opt(optparse.OptionParser):
         should either exit or raise an exception.
         """
         self.print_usage(sys.stderr)
-        self.exit(2, "%s: %s: %s\n" % (self.get_prog_name(), _("error"), msg))
+        self.exit(2, "%s: %s: %s\n" % (self.get_prog_name(), _("error"), msg,
+                _("Try `%s' for more information")%
+                "%s --help"%self.get_prog_name()))
 
     def checkVarSyntax(self,values):
         """Check value of parameter set, was used for change vars"""