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Editorial Team
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Asked: 2026-05-12T07:53:15+00:00

We have an Oracle 10.2.0 server running. There is a schema on the server

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We have an Oracle 10.2.0 server running. There is a schema on the server called FOO. I have created an ODBC connection to the schema using the 10.2.0 client.

We have a desktop application that has core database access libraries written by ourselves that uese SQLDriverConnect etc.

We also have a COM+ application that makes use of the same core libraries.

When I connect with the desktop application, using the ODBC connection, there are no problems.

Connecting with the COM+ application, I cannot perform any queries. SQLDriverConnect returns SUCCESS but then any attempt to peform a query gives an Oracle error “not connected”. The COM+ application is set to run as the “logged in user”.

I’m sure this is probably a security issue, but I don’t know where to start.

Any ideas?

Thanks.

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1 Answer

  1. Editorial Team

    I found what was causing the problem, it’s an Oracle bug.

    Cause:
    Oracle Bug 4991478; COM application not able to connect when using Oracle10g Client 10.2 if using Neutral Threading or Free-Threaded Marshaller, Fails With ORA-21561 / ORA-00022

    Solution:
    Install Oracle Client (patch) 10.2.0.3.0.

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