Hi everybody!
I've got some problems about Joint Push Pull - v2.0b: I followed all the steps for the installation, but when I open the program a window appears and says "Error Loading File jointpushpull_main.rb undefined method `get_last_state' for nil:NilClass".
Fredo6, what does it mean?

Thanks a lot!

Ps: I have Google Sketchup 8 pro...