arf ! understand till the water fall on the watermill...

@cadfather said: yes, i posted the code so you'd be sure of the one i used. notice i took out the '../' from the 2 folders paths (start of script) - which made the script look in the directory above to the comps folder. (so it only works on su8) if you put the folders in the same directory as the script it works. at least it does for me (check the case matches too) need to look more into to see why it doesn't when you change the path to full (ie. "c/Program Files/SketchUp...etc etc) OK now i understand it works for me also muchas gracias i shall try to change the path too...

And it work ! Thank y'all for your help...

In addition to TIG's info, you should move all the one-time code outside the loop. model = Sketchup.active_model entities = model.active_entities path = Sketchup.find_support_file "mymodel.skp" ,"Components/" . . . I also heartily recommend that you use four-space indentation in spite of the fact that two spaces is a Ruby convention. Four is much more readable which is why it is mandatory in Python, convention in C++, Java, JavaScript, ... (every language I know, except Ruby). New languages are always a PITA. Fortunately, quite a small subset of Ruby is all you really need to create SketchUp plugins.