Hi Ashfaq,

If you program already has started with separate parallel instances, how can they becomes serial again?

Can you give us a sample of minimum code to explain your problem?

Huiwei Lu

Postdoc Appointee

Mathematics and Computer Science Division

Argonne National Laboratory

http://www.mcs.anl.gov/~huiweilu/

On Tue, Feb 3, 2015 at 1:22 AM, Muhammad Ashfaqur Rahman <ashfaq226@gmail.com> wrote:

Dear All,
Take my greetings. I am new in mpich usage. I have problems in parallel run, when two fortran mpi programs are merged to one executable. If these two are separate, then they are running parallel.

One program has used spmd and another one has used mpich header directly.

Other issue is that while trying to run the above mentioned merged program in mpich, it's first started with separate parallel instances of same step and then after some steps it becomes serial.

Please help me in this regards

Ashfaq
Ph.D Student
Dept. of Meteorology

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