Pablo, sounds difficult.

So, you are setting the form's datasession property to Private and loading it, that is when you get this weird ZAP? Well, check in the help in the SET DATASESSION command. It will give you a list of all settings that must be re-set each time you load a new private datasession. You put code into 'BeforeOpenTables' in the DE to handle that.

Also, regarding this problem of a form coming up in Private DataSession rather than default even though you have it set to 'Normal', you're just going to have to trouble-shoot that one. In debug window you can define '_SCREEN.ActiveForm.DataSession' in the spot where it will stop whenever that value changes.

Wally