Thanks for advice, Sergey and Borislav; I'll try it tomorrow.

>I guess your forms use Private data session. Change lookup form to use Default data session and it'll see the tables in DE of the parent form.
>
>>It seems that this table / cursor is only accessible from the 'origin' form (the one with the DE).
>>When I change the form, without closing the first one, this table isn't accessible / visible any more; switching back makes it usable again.
>>
>>Strange thing, I never came across this issue before.
>>
>>>What prevents you from that?