In G4AssemblyVolume.cc, lines 168, 248 the condition: if( copyNumBase != 0 ) should be: if( copyNumBase == 0 ) otherwise it is not possible to force a copy number for the physical objects.
Hi, you're correct. It needs to be reversed to work as ment to be. Radovan
Thanks. The fix is now introduced in the development version. It will be available in a future patch to the latest release.