Thank you John, your code suggestions for move and rename worked perfectly. As I mentioned I am using Excel VBA to automate PowerPoint so I am writing the code in an Excel module, this has the disadvantage of not prompting me with any kind of syntax/method help. But if write in a PowerPoint module I get lots of syntax/method help so I guess that's the lesson I learned in this thread.

John, I can't thank you enough, you have been a great help. Thanks to all others for reviewing this thread.