Vlad,

>Looks like your SCX file corrupted. Try to open it as DBF file and look how many records with 'DataSession' class. If there are two of them - here is a problem. If there is only one - something wrong with its definition. Sometimes (I'm not sure - did not tried it), deleting of both data session records from SCX (and PACK after that) helps.

No, this is not the case. I've just ckecked, to be sure.
brow for 'data' $lower(class)

I'm pretty sure, that the problem lies in dangling object references somehow. I'll try to find KB article about this problem.
>
>>To expand this topic a little bit more. Today I was struggling (yep, can not find a better word :)) with one of my old project and first time noticed, that its form creates 2 private DS (2 - called unknown and 3 - called by name of the form). Form releases just fine, but has some other problems, which I have to chase down.
>>
>>Anyway, do you know, what may cause 2 DS on just one form?