[mpich-discuss] MPI_Scatter message truncated

Sufeng Niu sniu at hawk.iit.edu
Wed Jul 24 16:21:12 CDT 2013


I apologize to post so many questions, but I got a new question here: my
program runs everything well on 1 machine right now. when I run it on two
machines, the program got error:

Fatal error in PMPI_Scatter: Message truncated,
MPIDI_CH3U_Receive_data_found(131) Message from rank 0 and tag 5 truncated.
1774000 bytes received but buffer size is 52.
MPIC_Send(59).......: Negative count, value is -32

I cannot understand how does this happened. the hello world is tested for
network link. and the program is fine running on one computer.

Thank you very much for any suggestions

Best Regards,
Sufeng Niu
ECASP lab, ECE department, Illinois Institute of Technology
Tel: 312-731-7219
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