When a compound material is built from elements and other materials G4Exceptions appears for duplicate elements and sum of mass fraction is not 1.0, which provide extra warning messages. This happens for Run-2 LHC simulation for CMS with Geant4 11.0.
Hi Marc, please, attach the problem to me. I have a fix. Vladimir
Hello, the problem is fixed, the fix will be available in the next public release and in the next patch 11.0. VI