Frequently Asked Questions

Installation

• I don't like Conda. Are there alternatives?

• Conda commands are not working...

• I can't build my application or moose.

• I get a 'gethostbyname' failure.

• Some or all of my tests fail.

• How do I build my own libMesh?

• How do I build my own libMesh with VTK?

• How do I build my own PETSc?

Simulations

• Where is the stiffness matrix?

• How do I execute MOOSE in parallel?

• Why is my solve not converging?

• It solves fine in serial/with threads, but as soon as I use MPI it does not converge

• What is happening behind the scenes in my simulation? - During setup - During execution

• Why is my solve/application slow? - As a developer of the application - As a user

Civet Failures

• Troubleshoot errors only occuring on your PRs using our Apptainer containers.

Numerous questions/answers can also be found in on the following resources. Please search whether your question has already been answered before posting, and always consult the guidelines before posting!

• The MOOSE Discussion forum

• The old MOOSE Q&A mailing list (no new posts please)