Hi Viswanath, Nemesis supports multithreading. Have you initialized the MPI environment with MPI_THREAD_MULTIPLE threading support? If you still see the problem after the above initialization, please send us a minimal example code that reproduces it. Thank you, --Halim Abdelhalim Amer (Halim) Postdoctoral Appointee MCS Division Argonne National Laboratory On 7/30/15 9:40 AM, Viswanath Krishnamurthy wrote:

Hi All,

I am currently working on MPICH-version 3.1.4 on Ubuntu.. where I get an error stating that

Assertion failed in file src/mpid/ch3/channels/nemesis/src/ch3_progress.c at Line 252 * * The actual problem which I face is that currently even if MPI_Sends have already been dispatched, certain nodes keep waiting for MPI_Recvs which never arrive at all(Using multithreading). When I referred the internet, my understanding is that nemesis is written to handle only one thread receive. Please let me know about the latest patch for nemesis engine or the mpich version which has the changes. *src/mpid/ch3/channels/nemesis/src/ch3_progress.c *

Thanks, Viswanath

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