>I do a backup and pack each night while everyone is off the system, but one must have exclusive use of the tables to do that.
>
>I do not use the flush command currently. If I understand it correctly it writes to the disk and avoids caching. How does the flush avoid the corruption?

When you Pack, you also include the keyword Memo, I hope?

Personally I have never experienced any corruption at all, so I am only guessing. I have heard other people who have had corruptions didn't have the problem after adding Flush after every command that changes data.