Hi Chao-Chin, The code has been removed in commit 61c2f6f6ba90ca0c9a988fedf714f2f606674121 Author: Wesley Bland <[email protected]><mailto:[email protected]> Date: Wed Nov 15 10:00:22 2017 -0600 ch3: Remove unneeded internal barrier functions Signed-off-by: Pavan Balaji <[email protected]><mailto:[email protected]> Could you please try the latest MPICH 3.3b3 tarball or clone the MPICH master branch at https://github.com/pmodels/mpich ? If you still see any failure, please send us the config.log file at your MPICH build directory, and a simple reproducer program. Thanks, Min On 2018/10/06 22:59, Chao-Chin Yang wrote: 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]<mailto:[email protected]> To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss