Hi.
I'm trying to reproduce with de Unimdblookupcombo demo, but raises error can't find midas.dll.
I have tested with a prior build, 1556, and works perfect, and tested with a newer build, 1594, but have the same problem that build 1591.
In my case, in the onshow of the form, I open every dataset used by the combos. And only works fine, when I set a valid value the fist time. If noy, it works as I explained before,