>>I have a Form class in which are two tables loaded (PARENTTABLE and CHILDTABLE).
>>
>>PARENTTABLE and CHILDTABLE are linked with CID_PARENT field in PARENTTABLE.
>>
>>When I want to do:
>>
>>SELECT childtable
>>APPEND BLANK
>>
>>VFP 8.0 shows:
>>Cannot write to the record because it is in use (Error 1502).
>>
>>I don't understand why?
>>
>>I have discovered that when in DataEnvironment I delete Relation object between those two tables error disapear, but I need that Relation.
>
>Do you have a referential integrity trigger on the child table for the foreign key? If so, could use INSERT - SQL and do something like:
>

INSERT INTO ChildTable (ParentID) VALUES (ParentTable.ParentID)

No, I don't have referential integrity.