I've had this error come up a few times and its usually due to something within the copy you are trying to do e.g. The cells you are trying paste into have data already, the number of cells you are pasting in are greater than the number of blank cells available etc. I've even had this when the cells already appear to be blank but excel considers they contain information. Can you share some info on what you are doing during the copy and paste action such as range you are copying, cells you're pasting into, maybe some screens of the inputs for the action you're performing as well.
Also try stepping through the action and check if the cells contain any data first and if so then delete it and try the copy, paste action. If they appear blank and you get this error then select all the cells and delete them to make sure theyre clear and then try the paste action again.
