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Running squential and parallel linear solver in the same code?

To: petsc-users@xxxxxxxxxxx
Subject: Running squential and parallel linear solver in the same code?
From: "Ben Tay" <zonexo@xxxxxxxxx>
Date: Tue, 23 Jan 2007 19:42:34 +0800
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Hi,

In my MPI CFD code, I have to solve 2 linear eqns - momentum and poisson eqn. There's some error in the code and I don't know which one causes the error. May I know if it is possible to solve 1 eqn in sequential mode while the other in MPI to pinpoint the error since my code works ok in a sequential mode.

I tried to use this for one of the eqn:

call MatCreateSeqAIJ(PETSC_COMM_SELF,size_x*size_y,size_x*size_y,9,PETSC_NULL_INTEGER,A_mat,ierr)

call VecCreateSeq(PETSC_COMM_SELF,size_x*size_y,b_rhs,ierr)

but there's error.

Thank you.

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