No , I get very few error messages when using Carrara and Eric answers alot of the questions here at renderosity too.Although I know he is relocating sometime soon from one house to another . A couple of questions. - What is your computer system , I think the Mac isn't quite as stable at the windows version. - can you use Toon Pro at all , is it in the right Carrara/extensions directory? - when do you get your error messages .The "nil pointer error" you had I think means Carrara is looking for something but that something is not there. - I am guessing you imported a file, if so what type of file was it. You seem to have alot of shaders (340) in this file.