Jack, in order to see what the problem is, you need to post a more complete code, such as the code you used for the send, and any manipulation you did to your recvArray.
thanksI usedouble* recvArray = new double[buffersize];The receive buffer size
MPI::COMM_WORLD.Recv(&(recvDataArray), xVSize, MPI_DOUBLE, 0, mytaskTag);
delete  recvArray ;In first iteration, the receiver works well.But, in second iteration ,I got the
MPI_ERR_TRUNCATE: message truncatedthe buffersize is the same in two iterations.
ANy help is appreciated.thanks
Nov. 1 2010
> Date: Mon, 1 Nov 2010 08:08:08 +0100
> From: firstname.lastname@example.org
> To: email@example.com
> Subject: Re: [OMPI users] message truncated error
> Hi Jack
> Usually MPI_ERR_TRUNCATE means that the buffer you use in MPI_Recv
> (or MPI::COMM_WORLD.Recv) is too sdmall to hold the message coming in.
> Check your code to make sure you assign enough memory to your buffers.
> On Mon, Nov 1, 2010 at 7:26 AM, Jack Bryan <firstname.lastname@example.org> wrote:
> > HI,
> > In my MPI program, master send many msaages to another worker with the same
> > tag.
> > The worker uses
> > s
> > MPI::COMM_WORLD.Recv(&message_para_to_one_worker, 1,
> > message_para_to_workers_type, 0, downStreamTaskTag);
> > to receive the messages
> > I got error:
> > n36:94880] *** An error occurred in MPI_Recv
> > [n36:94880] *** on communicator MPI_COMM_WORLD
> > [n36:94880] *** MPI_ERR_TRUNCATE: message truncated
> > [n36:94880] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> > [n36:94880] *** Process received signal ***
> > [n36:94880] Signal: Segmentation fault (11)
> > [n36:94880] Signal code: Address not mapped (1)
> > Is this (the same tag) the reason for the errors ?
> > ANy help is appreciated.
> > thanks
> > Jack
> > Oct. 31 2010
> > _______________________________________________
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> > email@example.com
> > http://www.open-mpi.org/mailman/listinfo.cgi/users
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