>Hello.
>
>Does anybody know what "INDEX BASED ON EXPRESSION" is?
>
>When I try to set up a referential integrity in my vfp database, it say that "INDEX BASED ON EXPRESSION" may not behave as expected do you want to continue?
>
>thanks bunch.


It means you're using something other than just the field in the index tag. For example, you may have UPPER(Name).