I'm cutting data from multiple sheets and pasting it into one, using Paste
Values. This has been going OK for a while, but then when I cut data from one
of the sheets, I get the error:

This operation requires the merged cells to be identically sized.

I have no idea what any of these terms mean. I don't know what "merged
cells" are in this context, nor can I figure out where such a thing may be. I
don't know what "identically sized" means, because I'm selecting a single
cell, which is typical for a paste operation. In fact, it's not even clear
what "this operation" is referring too, and I have a feeling it's not "paste".

Anyone know what this means and how to fix it? There's no help on it that I
can find.

Maury