I have migrate an application made in dataeease 7xx to 8.5. It does not work properly. I can not delete feldt in forms. Feldt is still in the table. In realtionships I only get a table. When I update Feldt with DQL, it does not utdate  in the Reception Table.

Sounds like some updating of a table has gone wrong.

I don't think this has to do with migrating from 8.x to 7.x as that doesn't really change any forms/tables only update certain aspects of the version control system and check integrity etc.