Copying Sheet
 

I am copying a sheet. I have re-named my sheet shtSample.
Here is the exact code.

shtSample.Copy Befo=shtSample

It works in my spreadsheet 42 times and always dies on
the 43rd. It is always being called in the exact same way
from the exact same function. I have tried just before
the code executes on the 43rd time to add the sheet in
manually and I can not even do that.