A requirement error message appears when loading a module whereas an alternative dependency has been successfully loaded, thus loaded environment satisfies all dependency constraints.
$ cat modulefiles/cuda/11.6
#%Module
conflict cuda
$ cat modulefiles/cuda/12.2
#%Module
conflict cuda
$ cat modulefiles/hwloc/2.2.0
#%Module
conflict hwloc
$ cat modulefiles/hwloc/2.9.2
#%Module
prereq cuda/12
conflict hwloc
$ cat modulefiles/hwloc/.modulerc
#%Module
module-version hwloc/2.2.0 default
$ cat modulefiles/openmpi/4.1.5
#%Module
prereq hwloc/2.9.2 hwloc
$ ml cuda/11
$ ml openmpi
Loading openmpi/4.1.5
ERROR: Load of requirement cuda/12 failed
Loading requirement: hwloc/2.2.0
$ ml
Currently Loaded Modulefiles:
1) cuda/11.6 2) hwloc/2.2.0 3) openmpi/4.1.5
In the above example, an attempt to load hwloc/2.9.2 is done which fails as its dependency cuda/12 cannot be loaded (cuda/11 is already loaded). Main module openmpi/4.1.5 successfully loads as hwloc/2.2.0 is loaded instead of version 2.9.2.
The error message on openmpi loading block message about cuda/12 is disturbing:
- it does not relate to a direct dependency of openmpi/4.1.5, thus it is hard to understand what module requires it
- this error is not one for openmpi module load as an alternative has been successfully loaded.
Thanks to @adrien-cotte and his team for the bug report.
A requirement error message appears when loading a module whereas an alternative dependency has been successfully loaded, thus loaded environment satisfies all dependency constraints.
In the above example, an attempt to load hwloc/2.9.2 is done which fails as its dependency cuda/12 cannot be loaded (cuda/11 is already loaded). Main module openmpi/4.1.5 successfully loads as hwloc/2.2.0 is loaded instead of version 2.9.2.
The error message on openmpi loading block message about cuda/12 is disturbing:
Thanks to @adrien-cotte and his team for the bug report.