Hi, When analyzing recent files made from the DST maker in either of these places: /u/group/hps/hps_soft/hps-dst/centos7-64/bin/dst_maker /u/group/hps/hps_soft/hps-dst/build_new/bin/dst_maker It causes a crash when getMomentum() or getCharge() is called on an SvtTrack object: =========================================================== There was a crash. This is the entire stack trace of all threads: =========================================================== #0 0x00007efc2a30203c in waitpid () from /lib64/libc.so.6 #1 0x00007efc2a287092 in do_system () from /lib64/libc.so.6 #2 0x00007efc2ed64949 in TUnixSystem::StackTrace (this=0x16970c0) at /apps/root/5.34.36/root/core/unix/src/TUnixSystem.cxx:2419 #3 0x00007efc2ed6658c in TUnixSystem::DispatchSignals (this=0x16970c0, sig=kSigSegmentationViolation) at /apps/root/5.34.36/root/core/unix/src/TUnixSystem.cxx:1294 #4 <signal handler called> #5 HpsParticle::getMomentum (this=0x0) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/HpsParticle.cxx:164 #6 0x00007efc2f4f8bfe in SvtTrack::getMomentum (this=0x28c3570) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/SvtTrack.cxx:127 #7 0x00000000004078ec in main () =========================================================== The lines below might hint at the cause of the crash. If they do not help you then please submit a bug report at http://root.cern.ch/bugs. Please post the ENTIRE stack trace from above as an attachment in addition to anything else that might help us fixing this issue. =========================================================== #5 HpsParticle::getMomentum (this=0x0) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/HpsParticle.cxx:164 #6 0x00007efc2f4f8bfe in SvtTrack::getMomentum (this=0x28c3570) at /home/hps/hps_soft/hps-dst/hps-dst/src/hps_event/SvtTrack.cxx:127 #7 0x00000000004078ec in main () =========================================================== The culprit seems to be this part of the code in SvtTrack.cxx: int SvtTrack::getBlah() { if (fs_particle == NULL) return 9999; return ((HpsParticle*) this->fs_particle.GetObject())->getBlah(); } Files that were made around June 1 with the same DST maker work fine. Did something change since then? -Bradley ######################################################################## 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