You cannot have dbf or other files open for I/O and expect the backup program to back them up. Just won't happen. Maybe what you need to do in your backup script is to have it skip the directory with the 24x7 application and then somewhere in that app, replicate the data nightly to a directory that is backed up.

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> I had my application running 24 hours a day, processing huge dbf file from my clients outlet. However, my application always reported of error no 1104, error opening files during the time when my server is doing backuping of all the files. The error appears because of my application is processing the dbf file and my backup program is trying to backup it files too.
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> What can I do to change solve this problem. Any solutions or advise is very much appreciated. Thank you.