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The Pick List for the TNS Service Name Property Shows Junk/Garbage Characters When Accessed During the Configuration of an ODBC DSN (Doc ID 882357.1)

Last updated on MARCH 04, 2022

Applies to:

Oracle ODBC Driver - Version to [Release 10.2 to 11.2]
Generic Windows


You are using Instant Client ODBC Driver or Full Client ODBC Driver and getting garbled / junk / corrupt characters in drop down list for TNS Service name. You have set TNS_ADMIN in the registry to your ORACLE_HOME path where your tnsnames.ora resides.

Another possible reason for encountering the garbage / junk characters is as follows:

If you have not set TNS_ADMIN in the registry but instead as an environment variable and still see this problem then you may have a tnsnames.ora file with an appended .txt extension that may not be realized.




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