Crashed ACLiC?

[Pepe_Le_Pew]

No error when macro crashes

Nothing in the “output”, that you show in your post, suggests that your macro “died” in any way. Try to add some “debug” lines, e.g.: std::cout << "Before totalPE" << std::endl << std::flush; Double_t totalPE[fiberNum][numOfVoxels]; std::cout << "After totalPE" << std::endl << std::flush; There is just one possible problem in the line that you suspect. Your “Double_t totalPE[768][161616];” is 24MB long. It is possible that this exceeds your stack size “limit”. Try: [bash]$ ulimit -S -a [ba…