I am using ExN04 physics list and see constant memory leak in hadronic processes with latest 4.3.0.ref3 Initial size of the program in memory is 31 Mb, after 100 events with 100 GeV pion the size is 92 Mb after 50 events with 200 GeV pion the size is 84 Mb and after a while program exits with "out of memory" error message For electrons the program size is stable
Fixed in the latest hadronic_util tag.