Your problem is the ' character. It is supposed to be `. Notice the difference...

I think the first obstacle to cross when learning MEL is the syntax. If you've programmed with C or C++ before you'll understand MEL pretty well. If not, it may seem like swahili language :D

So a...

I play with it from time to time. Here's what I did a while back: http://forum.simplymaya.com/showthread.php?s=&threadid=2032