i have maya 2015
and i have it intalled at when i start it up it doesn't so up.
so i used the scrip editor and it work.
but when i shut it down and start it up it doesn't show up
I haven't tested it in Maya 2015, so I'm not sure it works. I asked someone who has maya 2015 if he can test it, so I'll tell you what he finds when he tests it. But it sounds like you messed up your usersetup.mel, I'm not sure what you did wrong though.
error a friend got with a simple cube
Looks like something is wrong with his UV map, because the error is happening when it tries to get the UVs off of a poly. I have no idea how to UV map stuff in Maya, so I'm not really sure how to fix that, sorry. Maybe try redoing them?