>Nadya,
>
>I'm searching in the KB, and find it some SEEK problems:
>
>Q135361 - BUG: SEEK Command Fails If Collate Is Set to "Machine"
>Q190496 - PRB: SEEK Finds Old and New Data With Optimistic Buffering
>
>In my case I have optimistic table buffering and collate to machine.
>
>I'll do more tests, thanks.

Thanks for sharing information, Pablo. I never had the problem with seek, at least, not that I knew about, but now I would be warned :)
Keep in touch.