Db2

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 Error : SQLSTATE=58004

Amit Mallick's profile image
Amit Mallick posted Wed March 18, 2026 06:46 AM

Hi,

I am getting the following error while trying to connect to DB2 database server

 error: Error: [IBM][CLI Driver] SQL1042C  An unexpected system error occurred.  SQLSTATE=58004,  Connector 'db2',  Method -Connect-  (-

DB2 Database server V12

DB2 Client using is V12.

Damir Wilder's profile image
Damir Wilder IBM Champion

Hi Amit,

It always helps to give extra details about your environment, such as which client you are using (Java, Python, ...) and on which environment (Windows?).

But anyways, according  to other people's experiences, you may want to check if your Db2 libraries are accessible on the client (i.e. in the PATH).

Check this article, for example:

https://github.com/ibmdb/python-ibmdb/issues/599

Hope this helps :-)

Paul Pearon's profile image
Paul Pearon

I will add to @Damir Wilder answer that most, if not all, of the Db2 driver options, have a basic connectivity test one can utilize outside of the program to validate the environment. Java: db2jcc.jar -url, CLI: db2cli, .NET:  testconn, etc.  There are minor syntax variations for UNIX or Windows, so please check the Documentation for specifics.