CFD Online Discussion Forums - FATAL ERROR

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FATAL ERROR - parallel processing

Hi everybody,

I tried to run a case on 16 processors using buoyantPimpleFoam solver.

I decomposed the domain according to the user's guide. And then run the case using the command:

<path>$ mpirun -np 16 buoyantPimpleFoam -parallel

but I got the following error:

--> FOAM FATAL ERROR:
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

From function UPstream::init(int& argc, char**& argv)
in file UPstream.C at line 79.

FOAM aborting

I have already used Foam in parallel, and am pretty sure that I've done everything correctly. Anybody has an idea what this error means?!

Please help! I may lose my job!!

hi, i know it was a long post. Just to share in case others are facing it. I solved it by recheck and changing the number of domains in decomposeParDict to that of the np. I am not sure if your case has the same careless mistake :p
because line 79 shows this:

Code:

if (numprocs <= 1)

    {

        FatalErrorInFunction

            << "bool IPstream::init(int& argc, char**& argv) : "

               "attempt to run parallel on 1 processor"

            << Foam::abort(FatalError);

    }

Btw, I read a solution which is u can move the line relating to OF to the end of the bashrc file in opt/OpenFoam 5/ etc/ bashrc.

Please correct me if I am wrong. Thanks :)