This software stack provides new versions of compilers, MPI libraries, and most other applications. Also there are significant changes w.r.t module suffixes (specifically MPI and MKL modules) and module interactions (we have added prerequisites of MPI and compilers for high-level packages to adhere to the compatibility in loaded modules in your terminal environment). Please refer to the release notes for detailed changes. 

This software stack is rolled out as a non-default on both machines. You will have to explicitly swap/switch spack modules to access the new software stack. The best way is to purge all loaded modules and load the Spack/23.1.0 like,

$> module purge ; module load spack/23.1.0

Please be aware, 

• Using the "module purge" command will unload all previously loaded modules from your terminal shell, including automatically loaded ones such as "intel," "intel-mpi," and "intel-mkl." This step is crucial to prevent potential errors that may arise due to lingering modules.

• In the future, when version 23.1.0 or later versions of the Spack software stack become the default, we will no longer automatically load any modules (e.g., compilers, MPI, and MKL). This change will provide users with a clean environment to begin their work.

We request you to reach out to us for any suggestions and questions. Use the "Spack Software Stack" keyword when you open a ticket at https://servicedesk.lrz.de/en/ql/create/26 .