In CMS long run Creator process pointer for a given track may be not defined if G4GammaGeneralProcess is used. In CMSSW in that case is rare and the protection is introduced to address this situation. The fix is required for the process itself. VI
Dear Koichi, please, attach the problem to me - I have a fix. VI
This problem is fixed and the fix will be available in the 11.1.1. VI