Hi, I am using mpicxx for MPICH version 3.2.1 Apple LLVM version 10.0.0 (clang-1000.11.45.2) Target: x86_64-apple-darwin17.7.0 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin But I run into a runtime error: Assertion failed in file src/mpid/ch3/channels/nemesis/src/ch3i_comm.c at line 139: 0 internal ABORT - process 0 Assertion failed in file src/mpid/ch3/channels/nemesis/src/ch3i_comm.c at line 139: 0 internal ABORT - process 1 I looked into the source code ch3i_comm.c and found that there is a FIXME comment but I am not quite sure I get the picture. So my question is: In what condition(s) does one get this assertion error? Sincerely, Chao-Chin Yang Postdoctoral Scholar Department of Physics and Astronomy University of Nevada, Las Vegas, U.S.A. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss