Hi Amjad, As the error message, "25 bytes received but buffer size is 24”, says, your buffer size is smaller than the message size. You need to increase your buffer which is the memory pointed to by the first argument of MPI_Recv. Best regards, Sangmin On Oct 27, 2014, at 12:27 AM, Md. Amjad Hossain <[email protected]> wrote:

Hi,

I am sending and receiving a user defined (struct) data type using MPI_Send and MPI_Recv function. I am getting following buffer overflow error.

Fatal error in MPI_Recv: Message truncated, error stack: MPI_Recv(187).....................: MPI_Recv(buf=0x7fff2248b930, count=1, dtype=USER<struct>, src=0, tag=1, MPI_COMM_WORLD, status=0x7fff2248b970) failed MPIDI_CH3U_Receive_data_found(131): Message from rank 0 and tag 1 truncated; 25 bytes received but buffer size is 24

If I just send one byte less, everything is working properly. Could anyone please let me know which buffer it is and how can I increase the buffer size to avoid the error?

Regards Amjad _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss

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