ART Build Rig Problems

I’m having some problems with the ART plugin for maya 2012. When I try to build the rig for my character, after taking the screenshot it puts the model in the “rig pose”, opens a new scene and nothing else happens. It never goes past 0%.

Before opening the new scene I believe (not completely sure about the exact moment) it gives an error:

#Error: RuntimeError: The namespace name “:” contains no legal characters.

I’m using a custom character imported as an OBJ from 3ds Max, if that helps.

Anybody know how to fix this? I would really appreaciate your help. Thanks!

Nevermind. I’ve tested the scene in Maya 2013 and it works well. I guess its a Maya 2012 bug.