Problem with copying sheets
 

When I was trying to copy a lot of sheets from one workbook to another, Excel
stops copying graphs on those sheets after a while. And after that, I can't
even copy sheets to the destination workbook. And excel doesn't show any
error message.

It only has 8 sheets I want to copy and each sheet contain about 18 graphs.
Is it because too many graphs or something else? Too graphic?

Thanks!