Funny, I thought I knew that about global and was pretty sure it had to be right after the def, but couldn't find it in the docs (docs say 'has to be in same code block') so I left it where it was. I merely changed some variable names around. 'The Real WTF' indeed gave the correct...

TRWTF is that it's not so difficult to write an algorithm for copy and paste between areas of different sizes or shapes, yet 'Excel' can't handle it. Or maybe TRWTF is that my program that does this is written in C#.

Yeah - low humidity and electronics = ouch