Thank you very much for your help.
I was finally able to launch a session.
Regarding your question: no, I have never encountered any verse compilation errors.
Also, to give you more information:
This morning, I discovered that when I removed the file containing that line, the cook error I had has disappeared. However, I still wasn’t able to launch a session but I was able to build a private code.
So I worked like that all afternoon, building private code to test my modifications, and now, after receiving your message, I tried launching a session again and it works!
So multiple issues in same time, but again thank you, everything seems to work now.