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titleImportant changes regarding environment modules on Argon

old environment modules moved to "legacy" stack

The original set of environment modules on Argon have been available by default and their availability was not removed upon loading one of the newer stack modules. As the software stacks have grown, in size and complexity, that introduces more opportunities for module collisions in an environment. With this change, the old modules will be made available as a distinct stack, just like the newer stacks. Thus, it will no longer be possible to have the legacy modules available at the same time in a session as newer modules. The modules will still be available, they will just be swapped out with other stacks. For now, the legacy modules stack will be loaded by default if you do not have a default module set. However, if you have a default module set that was generated prior to this change that consisted of legacy modules then you will need to regenerate the set. If you see the following message:

No Format
Lmod Warning:  You have no modules loaded because the collection "default" is empty!

then this applies to you.

Table of Contents

The HPC cluster system at the University of Iowa has many software packages installed and sometimes different versions of the same package. These software programs are installed in several different directories. These software packages are made available for use via environment modules. See Argon Software List - HPC Documentation - UIowa Wiki for the software installed on Argon.

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