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Error: Failed to connect to the database. Column index not found[ ]

Error Message

When using ArcCatalog's Spatial Database Connection dialog to establish a direct connection to an Oracle server, the following error occurs:

"Failed to connect to the database. Column index not found[ ]" followed by "Unable to open the selected database (with the current connection properties)."

Cause

The ArcGIS client version is incompatible with the sdesetupora8i version executed on the server. The sdesetupora8i executed on the server must be the same version as the client attempting to establish the direct connect.

Solution or Workaround

Run the sdesetupora8i executable from the client's ..\arcexe81\Bin directory to make sure the ArcGIS client version and sdesetupora8i are compatible.