Hi, Holly. Can you try this slic I just installed and tell me if it fixes the issue with the 3d field? [$] . /u/group/hps/hps_soft/slic/release-v05-00-00/init_ilcsoft.sh [$] slic [args] This is the latest version of most packages, including Geant4. If we get it working then I can try to make a build that reverts back to G4 9.6.x if you are worried about comparisons/reproducibility with old MC data. --Jeremy ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1