Excel closes wrong instance

[bilboexcel]

Sometimes when I have two excel workbooks open, If I click the cross on one to close it, the wrong workbook closes without saving. This even happens when the excel closed is on a different screen to the one I have closed.

Any ideas what could cause this?

Many thanks!!

 

[sijpie]

no, that is totally weird. Never encountered it.
Does it happen with any workbooks, or only with specific workbooks?
Does it happen when you close from the taskbar?