.XLSM sheet shuts down after any changes are made

[Plasmech]

I have an .XLSM that, until this morning, worked fine.

No changes have been made to it recently.

Now, if I try to make *any* changes to it, Excel crashes and I'm back on my desktop.

Even if I simply select a cell and press Enter, Excel crashes. Any kind of "execution" whatsoever causes a crash to the desktop.

Where would I begin in troubleshooting this?

I prefer not to upload the file. If it comes down to it, though, I realize that I may have to.

Thanks for any help.

I apologize if this post is annoyingly vague.

 

[Joe4]

It sounds like your workbook may have become corrupted.
Your best bet probably would to restore a copy from the last time it was working like it was supposed to.

 

[Plasmech]

Update:

I sent the file to a coworker. He had no issues using it.

I asked him to save it as a copy and send it back. The copy works fine on my PC.

Strange.

 

[Joe4]

Yeah, without seeing it, and what it is running against, it is hard to tell.
I have seen things like this happens when the data it runs against changes in a way where the code is trying to access a row or column that does not exist.

Anyway, glad you seem to have things working again.