I am using Maya 2014, I exported the models as OBJs after I've done their UV mapping and did my work on Mudbox, however after I was done I decided I wanna modify the main model on Maya and fix the UVs accordingly. It did not work and I had to start from scratch, but what's driving me crazy is that even when I want to redo the Uv mapping I can't unfold or even move the UVs on the very basic model I started with. I exported the model in different file formats, deleted the history, but to no avail. The UV map has just became unresponsive. It only extracts, but does not unfold and whenever I change the UVs position in the UV texture editor (if it worked) and try to unfold them they revert to their previous fixed position, why is that happening?