OK, I hope my miriad of questions isn't bothering anyone, but when I get the bug about learning something new, I keep trying things until something works. Since I don't have anyone at work that knows MEL scripting, I've come to you all.

I'm making an install script that whenever anyone in my office needs the new tools I make, they can run the script. It works, so I'm trying to make it smart and it will only add the buttons that a person doesn't already have. This is what I've tried that doesn't work.

if (!`contextInfo -ex showImagePlane`)
{
shelfButton
-enableCommandRepeat 1
-enable 1
-width 34
-height 34
-manage 1
-visible 1
-label "showImagePlane"
-image1 "showImagePlane.bmp"
-style "iconOnly"
-parent $selTab
-command "showImagePlane;\r\n";
}

Any know why it keeps installing the same buttons and how to get it to do what I want?

thanks again.