Hi John,
I know where the reference to MASTER comes: the view on which the grid is based goes like this.
select ... from DETAIL where DETAIL.idmaster = ?MASTER.id

But nothing else references MASTER. The table is opened with tha alias mt_MASTER and all the methods that move the form refer to mt_MASTER. To move a record the toolbarbar does something like
skip in mt_MASTER
thisform.RefreshGrids()

RefreshGrids is a simple method that goes through the grids in a form issuing a series of requeries and refreshes.

What I would like to know is why moving a record in mt_MASTER, with also MASTER opened in the DE produces a correct result. Nothing, other than the wher clause in the grid is referencing MASTER so, the table shoud open on a record, let's say the first, and stay there. And it stays there.

Thanks for the interest. This is the sort of problem that really keeps me awake, more than when a program is not working. This one shouldn't work but it does. It is even more disturbing to me than an ordinary bug. To me is a sort of an alarm bell that indicates that there is some seriuos mistake that if not caught now it may reappear and go undetected for ages. And I like to solve this kind of problem too, if i can...

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Somewhere on the form, probably in the ControlSource - or perhaps a rowsouce in the case of List/Combo or the Recordsource in the case of a grid, is referencing MASTER as an alias. Check through the controls and these properties, and it should popup. Also, check the code for any references to MASTER.