Excel 2007 : How to copy from one sheet to another without freezing

Hi All

I have written a stock control programme using excel

I have sheets from 1 to 30

When I try to copy of say sheet 17 to sheet 18

Excel hangs and i get an error stating that resources need to be free


Any help here would be highly appreciated


Kind regards

Raj

Each month I have to clear the data for the next mont is there a way around to clear the sheets automatically without changing the formula

Am attaching my spreadsheet

having a prob with uploaded 2.5mb file

Your post does not comply with Rule 1 of our Forum RULES. Your post title should accurately and concisely describe your problem, not your anticipated solution. Use terms appropriate to a Google search. Poor thread titles, like Please Help, Urgent, Need Help, Formula Problem, Code Problem, and Need Advice will be addressed according to the OP's experience in the forum: If you have less than 10 posts, expect (and respond to) a request to change your thread title. If you have 10 or more posts, expect your post to be locked, so you can start a new thread with an appropriate title.
To change a Title on your post, click EDIT then Go Advanced and change your title, if 2 days have passed ask a moderator to do it for you.