diff --git a/Generators/EvgenJobTransforms/share/skel.GENtoEVGEN.py b/Generators/EvgenJobTransforms/share/skel.GENtoEVGEN.py
index da3b49696c1165dc8345edf7291fe8a73f1fe62d..d11c89714cf8b87879e72186a8e0a5034a785efc 100644
--- a/Generators/EvgenJobTransforms/share/skel.GENtoEVGEN.py
+++ b/Generators/EvgenJobTransforms/share/skel.GENtoEVGEN.py
@@ -549,8 +549,8 @@ rel = os.popen("echo $AtlasVersion").read()
 rel = rel.strip()
 errorBL = checkBlackList("AthGeneration",rel,gennames)
 if (errorBL): 
-#   raise RuntimeError("This run is blacklisted for this generator, please use a different one !! "+ errorBL)  
-    evgenLog.warning("This run is blacklisted for this generator, please use a different one !! "+ errorBL )
+   raise RuntimeError("This run is blacklisted for this generator, please use a different one !! "+ errorBL)  
+#    evgenLog.warning("This run is blacklisted for this generator, please use a different one !! "+ errorBL )
 
 
 ##==============================================================
diff --git a/Generators/EvgenJobTransforms/share/skel.GENtoTXT.py b/Generators/EvgenJobTransforms/share/skel.GENtoTXT.py
index 3d5837330b3e4c118952d54cff0ebd14db27f13a..1154a256820de98b342e4bd66640b55cd7a733b7 100644
--- a/Generators/EvgenJobTransforms/share/skel.GENtoTXT.py
+++ b/Generators/EvgenJobTransforms/share/skel.GENtoTXT.py
@@ -490,8 +490,8 @@ rel = os.popen("echo $AtlasVersion").read()
 rel = rel.strip()
 errorBL = checkBlackList("AthGeneration",rel,gennames)
 if (errorBL):
-   evgenLog.warning("This run is blacklisted for this generator, please use a different one !! "+ errorBL )
-#   raise RuntimeError("This run is blacklisted for this generator, please use a different one !! "+ errorBL)
+#   evgenLog.warning("This run is blacklisted for this generator, please use a different one !! "+ errorBL )
+   raise RuntimeError("This run is blacklisted for this generator, please use a different one !! "+ errorBL)
 
 ##==============================================================
 ## Handling of a post-include/exec args at the end of standard configuration
diff --git a/Projects/AthGeneration/externals/MadGraph5Amc.cmake b/Projects/AthGeneration/externals/MadGraph5Amc.cmake
index 2a6ee88307ab7a33ea3298f71276b8ba7104ff9a..7828de1db38507bc7a5168969adcd2cbd359a107 100644
--- a/Projects/AthGeneration/externals/MadGraph5Amc.cmake
+++ b/Projects/AthGeneration/externals/MadGraph5Amc.cmake
@@ -1,4 +1,4 @@
-#
+# 
 # File specifying the location of MadGraph to use.
 #