>Hi nadya,
>
>I don't quite understand what you're doing here, but I guess it could be concurrency (multiuser) problems.
>
>The select statement uses OS level buffered data when it can. It does not ensure that it uses the most recent data on the network.
>
>Before checking for uniqueness, the involved table must be (file)locked in order to get the most recent data from it.
>
>Walter,

Hi Walter,

The appender application could be run by only one user. I don't use buffering at all for this particular application.

Do you think, it could be some internal NT buffering, which causes this select to return incorrect results?

So, do you suggest to open BatchCntrl table exclusively before running this select statement?

This is all very weird...