Is this worse than a fatal error?
Be careful when you change the name of a UserForm. Here's what happened when I tried it.
Oh come on, it's just a computer program. Generally, the term catastrophic is used to describe an event such as an earthquake or an airline crash. Crashing Excel is such a common occurrence that it's hardly worthy of such a description.
Perhaps not surprisingly, clicking the Help button doesn't really tell me much about this catastrophe.
I also like the way the Help file makes it clear that Excel is not responsible for this one. Sure, blame the system or an external component!
But then again, a catastrophic failure error does convey more information than an unspecified error...
