Hi, The first error message indicates that the parameters specified to the program when running through VS is incorrect (Likely a VS configuration issue when running your code - I am assuming you are running your code as a singleton process here). In the second case (error message when running via command prompt), the error message indicates that you have specified a negative (or too large for an integer) count in the MPI_Scatter() call. The address of the receive buffer also looks to be NULL. You might have to debug your code or provide us more information so that we can help you. Regards, Jayesh ----- Original Message ----- From: "Suvarna Arakh" <[email protected]> To: [email protected] Sent: Wednesday, March 27, 2013 2:48:54 PM Subject: [mpich-discuss] MPI error, help needed Hi, I am trying to run my MPI program on multiple processes, but I get the below errors, attached is the code. The code runs fine on 1 process. When running through Visual studio 2008: buffer provided too short for path: 4096 provided, 0 needed launch failed: CreateProcess(""ABC-HP c:\Users\ABC\Desktop\BS\Debug\BS.e xe) on 'ABC-HP' failed, error 87 - The parameter is incorrect. When running through command prompt: Fatal error in PMPI_Scatter: Invalid count, error stack: PMPI_Scatter(791): MPI_Scatter(sbuf=10030040, scount=-858993460, MPI_INT, rbuf=0 0000000, rcount=-858993460, MPI_INT, root=0, MPI_COMM_WORLD) failed PMPI_Scatter(728): Negative count, value is -858993460 Enter number of elements to be sorted job aborted: rank: node: exit code[: error message] 0: ABC-HP: 1: process 0 exited without calling finalize Please help. Regards. _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss