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It is not recommended to load any modules or to execute any '. s.ssmuse.dot' commands in this file because some of them do not get along. Meaning if one module is loaded another tool some other tools might not work anymore. So if you do decide to load any modules automatically and some other tool is not working, comment all automatic load(s) in the above file, open a new window and try the tool that did not work again.
Instead of loading modules automatically I suggest to create aliases. For example if you frequently want to read RPN files with Python3 you could create the following alias in the above file:
alias py3='module load python3/miniforge3; module load python3/python-rpn; module load python3/outils-divers; source activate base_plus'
Then all you have to do if you want to use Python is to execute the "command" (alias): py3
As you can see it is possible to put several commands in the same alias by separating them with semicolons.