On 9/3/21 8:58 PM, Thang W Pham wrote:
And then when I test the library with step-17 tutorial, here is the error:
PETSc Error --- Application was linked against both OpenMPI and MPICH based
MPI libraries and will not run correctly .....
The description of the error provided by PETSc is "MPI library at runtime is
not compatible with MPI used at compile time".
The numerical value of the original error code is 87.
I think I need some steps to make deal.ii configure MPI properly but I cannot
figure it out.
This is the error message that matters: You are compiling PETSc with one MPI
library, but deal.II with another. This can not work. In fact, if you have
both installed on your system, I would suggest removing one before the whole
installation procedure just to avoid this exact situation.
In general, if you can, it's probably worth using a script such as candi
instead of trying to install everything by hand.
Best
Wolfgang
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Wolfgang Bangerth email: [email protected]
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