That doesn't sound like a standard excel error message to me.
But it does sound like an error message that can pop up if there's an error in a
macro.
My bet is you have a macro that's trying to rename the sheet--maybe based on a
cell in that worksheet (or another worksheet).
I bet if you:
close excel
restart excel in safe mode
windows start button|Run
type this and hit enter
excel /safe
file|open your workbook
try renaming the worksheet and I bet it works.
If I'm correct, then you'll want to track down the author of the workbook (it
doesn't sound like it's you) and show him/her the problem.
In fact, the next time you get the error message, there will be a button at the
bottom that has a "Debug" caption.
Since you're seeing that long message, you should be able to click on that debug
button and see the line of code that's causing the trouble.
That may not help you, but it should help the author.
Hi David
If I minimise the file there is a blank folder behind it with just toollbar
across the top - no cells underneath.
Message is invalid name
Do not exceed 31 Characters, ensure does not cantain the usual characters
and ensure you did not leave the sheet un nmaed or words to that effect.