Are the tables in a different location from where they were when the form was created? Do you get warning messages when you open those forms saying something like "Unable to locate xxxx file." Are you given the option of locating the file?

>>>Sometimes all tabels and relationships between them dissappears and I dont't know why.
>
>I'm using VFP 5.0a version.
>I've noticed it when I've started to work with old forms. But it occurs sometimes. I don't know exactly when, because when you start the form and it shows that it can't find the tables. :(