Just thought I'd let you know you prompted me to go looking for the file Sketchtalk.rb AND I've found it! Along with some others that I think also make it work and give other options too.

thanks again for your reply, and for increasing my understanding.

No, I don't think so. as the original command wasn't written as "load '/r/sketch_talk.rb'" but as "load 'sketchtalk.rb'"

originally the error and the ruby file read "sketchtalk.rb" but I changed it because I've seen it written /r/sketch_talk.rb in another post and thought that might make a difference. So now I understand it's a file path I can see it wouldn't I'll change it back, but unfortunately will have the same error except it will read:

Error Loading File windowmaker_4_1_rel.rb
Error: #<LoadError: cannot load such file -- sketchtalk.rb>
C:/Users/darren/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/windowmaker_4_1_rel.rb:6:in load' C:/Users/darren/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/windowmaker_4_1_rel.rb:6:in <top (required)>'

thanks tho.

I used to use SketchUp 2016 with a .rb file located here:
C:\Users%USERNAME%\AppData\Roaming\SketchUp\SketchUp 2016\SketchUp\Plugins

Now that I'm using 2021 I have found that it doesn't work any more. /sadface.

I've tried zipping the file and renaming it to .rbz then using the install manager, the file ends up in the same place ( C:\Users%USERNAME%\AppData\Roaming\SketchUp\SketchUp 2021\SketchUp\Plugins) which looks good as there are other extensions in the folder that work fine.

when SketchUp loads I get this error message:

,,,Error Loading File windowmaker_4_1_rel.rb
Error: #<LoadError: cannot load such file -- /r/sketch_talk.rb>
C:/Users/darren/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/windowmaker_4_1_rel.rb:6:in load' C:/Users/darren/AppData/Roaming/SketchUp/SketchUp 2021/SketchUp/Plugins/windowmaker_4_1_rel.rb:6:in <top (required)>',,,

The original file was given to me by a collegue who wrote the original .rb file so I'm afraid I have no idea what this means other than there's something wrong with line 6, am I supposed to find another extension called sketchtalk?
Any help is appreciated as I'm losing hours to finding a tool that works as well as this one did.