Changing DS in a form is risky business in that your controls can become unbound from their ControlSource. Regardless, the command, set datasession to 1 or some other valid number, should be valid.

>Ah! I see where I'm confused now. I change the datasesion in a generic tableupdate method of oApp. That's why the datasesions change when I access the nextkey method ...
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>Thanks.
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>Still does not explain why set datasession is ignored in the form though :)
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>Ah well...
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>Marc