TNS-12212: TNS:incomplete PREFERRED_CMANAGERS binding in TNSNAV.ORA
Cause: The PREFERRED_CMANAGERS binding in the client's TNSNAV.ORA file does not have a CMANAGER_NAME specified.
Action: Define the CMANAGER_NAME as part of the PREFERRED_CMANAGERS binding. Use of the Oracle Network Manager should eliminate this error.