Thanks Sergey but unfortunately I’ve tried that an access to Referential Integrity is still disabled. On another computer I opened a copy of the database “SHARED” and access through the menu ant the “Edit Relation” dialog box are enabled, however when you click a messagebox appears that the database should be opened exclusive.

Oscar

>>I recently created a data base on a PC with a new installed VFP 6.0, but when I tried to access the Referential Integrity Dialog Box (or builder), the option is disabled. I already cleaned the database but it is still disabled.
>>
>>Thanks in advance for any hints
>>
>>Oscar
>
>Try to open your database exclusively

OPEN DATABASE Mydatabase EXCLUSIVE