Are the same versions of the Oracle Client installed on all the machines?Also, during your tests, are you using the same connection string to connect to Oracle so data is being retrieved from and posted back to the same database/user? Make sure there are no private synonyms for the user that point to the same table names under an outdated schema/user.

>Also, with this, It does work ok on other Win XP machines. One thing different on the machines that give this error, is that they have NOVELL GROUP WISE on them. We removed that and still have the same problem.
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>TIA
>Mark