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<p class="MsoNormal">Before calling MPI_Finalize, I am calling MPI_Comm_free at both ends (processes) of an intercommunicator created by MPI_Intercomm_create
<o:p></o:p></p>
<p class="MsoNormal">and am crashing with the following error in one of the processes:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="color:red">Assertion failed in file ../mpich-4.1.2/src/mpid/ch3/src/ch3u_request.c at line 480:
<o:p></o:p></span></b></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x2d3bf3) [0x7f6d10e1fbf3]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x225124) [0x7f6d10d71124]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x33016) [0x7f6d10b7f016]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x29eada) [0x7f6d10deaada]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x1dfb7c) [0x7f6d10d2bb7c]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(+0x1d78cd) [0x7f6d10d238cd]<o:p></o:p></p>
<p class="MsoNormal">/opt/mpich/lib/libmpi.so.12(<b><span style="color:red">PMPI_Comm_free</span></b>+0xe7) [0x7f6d10bfe6b7]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(_ZN7needles12IntercomList20handleFailedIntercomERSt17_Rb_tree_iteratorISt4pairIKiPNS_16IntercomListElemEEEiPKc+0xae) [0x4c348a]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(_ZN7needles12IntercomList19disconnectIntercomsERilb+0xcf) [0x4c36fb]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(_ZN7needles16NeedlesMpiMaster8finalizeEv+0x25f) [0x496e25]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(_ZN7needles16NeedlesMpiMaster4loopEv+0x74e) [0x49355a]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(main+0x4af) [0x48d1e5]<o:p></o:p></p>
<p class="MsoNormal">/lib64/libc.so.6(__libc_start_main+0xf3) [0x7f6d0f186ca3]<o:p></o:p></p>
<p class="MsoNormal">/home/kmccall/Needles2/NeedlesMpiMM(_start+0x2e) [0x48cc7e]<o:p></o:p></p>
<p class="MsoNormal"><b><span style="color:red">internal ABORT - process 0<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span style="color:red"><o:p> </o:p></span></b></p>
<p class="MsoNormal">I looked in ch3u_request.c and there seems to be no assertion at line 480. If I forgo the MPI_Comm_free in the first process, the<o:p></o:p></p>
<p class="MsoNormal">same error then occurs in the second process. Does this give you any clue as to what I am doing wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal">Kurt<o:p></o:p></p>
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