1 files changed, 1 insertions, 1 deletions
diff --git a/scripts/Util.py b/scripts/Util.py
index 708ace84417..dce5c427f3b 100644
--- a/scripts/Util.py
+++ b/scripts/Util.py
@@ -807,7 +807,7 @@ class Mapping(object):
     @classmethod
     def getByName(self, name):
         if not name in self.mappings:
-            raise RuntimeError("unknown mapping `{0}'".format(name))
+            raise RuntimeError("unknown mapping `{0}', available mappings `{1}'".format(name, self.mappings))
         return self.mappings.get(name)
 
     @classmethod