Full Optimize Failing

Hello,

Was wondering if any experts can give any insite into how to fix our full optimize from failing. We have had a custom package running for a few years which one of the last steps it does a full optimize. About a week ago it started to fail on this step and when we try to manually optimize from the front end it fails as well. We are able to optimize from the backend however. There are no additional processing running during this time, can anyone give any suggestions on what may be causing the problem? Is there some temp file that needs to be cleaned? I tried to do a modify of the application and that has not worked. We are on version 7.0.

Thanks in advance!

Kevin