[mpich-discuss] “Invalid rank” error message MPICH2

Parviz Ghahramani Parviz.Ghahramani at inncelerex.com
Tue May 18 16:55:08 CDT 2021

Thanks. That helped to figure out the issue.

-----Original Message-----
From: Raffenetti, Kenneth J. <raffenet at mcs.anl.gov> 
Sent: Tuesday, May 18, 2021 3:54 PM
To: discuss at mpich.org
Cc: Parviz Ghahramani <Parviz.Ghahramani at inncelerex.com>
Subject: Re: [mpich-discuss] “Invalid rank” error message MPICH2

The output indicates you have 2 MPI processes in your application. The ranks of those processes in MPI_COMM_WORLD would be 0 and 1, so 2 is not a valid destination rank for your message.

If your application requires more than 2 processes, you'll need to amend your launch settings to start more.


On 5/18/21, 2:47 PM, "Parviz Ghahramani via discuss" <discuss at mpich.org> wrote:

    I am trying to run a process for parallelization over 4 cores. This is run on Windows EC2 instance on AWS.  Initially I was getting error message that MPI rejected credentials. I entered and registered the credentials.  Now I get the following message “Invalid rank”.
    USING PARALLEL PROFILE C:\nm75g64\run\para300.pnm
    Building NONMEM Executable
    Starting MPI version of nonmem execution ...
    Manager Location EC2AMAZ-EP7B8E1\\c:\nm75g64\run
    Fatal error in MPI_Send: Invalid rank, error stack:
    MPI_Send(173): MPI_Send(buf=00000000037FFD40, count=1, MPI_INTEGER, dest=2, tag=2, MPI_COMM_WORLD) failed
    MPI_Send(98).: Invalid rank has value 2 but must be nonnegative and less than 2
    job aborted:
    rank: node: exit code[: error message]
    0: localhost: 1: process 0 exited without calling finalize
    1: localhost: 123  
    Can anyone provide guidance what this message is and how I can resolve it?
    Kind regards

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