Animation and Rigging Tools: FAQ, Known Issues and Feature Roadmap

HI Guys,
I need help, I’ve built in using ART tools for my students here at Uni. after many set-backs we are at the last stages and they are getting their rigs ready for UE4. A couple of issues have arisen.

some characters have been successfully rigged in ART tools and exported to UE4, however after animation is applied the .fbx export file option has vanished from the window

Error: WindowsError: file C:/Program Files/Epic Games/4.10/Engine/Extras/Maya_AnimationRiggingTools/MayaTools/General/Scripts\ART_exportMotion.py line 2093: 3

This is the error in Maya.

Also another error is that some of my students are working on the proxy rig but the animation interface isn’t working, if they switch it on it says there is no rig found in the scene, would I like to add one. But the proxy rig is in the scene. These students have done animation on these rigs and I don’t want them to add it again.

Any help would be great Thanks.