Issue with running step-55

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Md Mahmudul Islam

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Jun 23, 2025, 4:41:06 PM6/23/25
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Dear all,
I hope this email finds everyone in this group in good health. Currently, I am working on my code using Step-55, parallelizing it. In my macOS, in deal.IIConfig.CMake, I have made sure to 
set (DEAL_II_WITH_P4EST ON)
set (DEAL_II_WITH_PETSC ON)
set (DEAL_II_PETSC_WITH_COMPLEX OFF)
set (DEAL_II_WITH_TRILINOS ON)

Now I can compile my step-55, but when I run the code, it gives me an error for p4est/petsc/trilinos.
Could anyone please let me know what the issue might be?
Can I run MPI code in my installed dealii, or do I need to delete and start from scratch?

With best regards,
Md Mahmudul Islam
PhD student
University of Alabama at Birmingham


Bruno Turcksin

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Jun 24, 2025, 8:54:31 AM6/24/25
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Hello,

You are not supposed to modify configuration files. You need to reconfigure and reinstall deal.II from scratch.

Best,

Bruno

Md Mahmudul Islam

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Jun 24, 2025, 1:04:39 PM6/24/25
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Thank you all. Okay, I will remove Dealii from my laptop and reinstall it. When I reinstall, what should I focus on to run step 55, the parallel code?

Md Mahmudul Islam

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Bruno Turcksin

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Jun 24, 2025, 1:22:35 PM6/24/25
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You need to configure deal.II with MPI, P4est, and either Trilinos or PETSc with complex support.

Bruno

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