>Dear Barbara,
>
>VFP300.esl is in the windows\system directory in my case, I am sure. I really
>don't understand why the message appears, and often causes the program to stop.
>
>There was one time the problem occurred each time when I executed a form. That time, after I recreated tables for all used tables, copied the contents, and made the desired index, the problem seemed gone. I am really wondering whether system down has caused the database unexpected problems.
>
>Best regards,
>Ron.

Ron, presumably you have followed Vlad's excellent suggestion to replace the VFP300.ESL file with a backup copy, to make sure it wasn't damaged. If you think your data might have been damaged by the system breakdown, you could do a Validate Data Recover on the DBC to check it.

HTH
Barbara