In Excel, you can always find things out if you want to.There's some VBA working in the background, so it's quite possible. I think I'll chalk this up to a bit of a mystery. I can work without knowing what the cause of it is anyway, so it's not that big a deal.
Good day shrivallabha
You would be surprised how many users have set macro permisions so that they do not get the warnings and worksheets open with macros.