@Helm,
I understand that you don't understand, because I gave the wrong plugin. Since I haven't been able to use them for a while, I confused the "Openings" plugin that I used to make niches in walls, and the "Wall Openings" plugin that is indeed no longer useful, both published at vectordepot.
I'm really sorry to have made MullinRJ work for nothing, and I thank him again for the help.
Moreover, I was able to fix the "Openings" plugin thanks to the information he gave me about obsolete Script Function.
It is part of a set of plugins written by Paolo Marcuccetti and published open source in Vectordepot
http://www.vectordepot.com/openings_help/readme.html
It is very easy to update them, no need to know how to code. Just replace all SetLS by SetLSN, GetLS by GetLSN, PenPat by PenPatN, etc.
If I could do it everyone can do it . . . If you think these plugins useful, of course.