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TNS-00008:

INTCTL: could not contact destination Navigator
Cause: Connection could not be properly established to a Navigator. This may be because the Navigator specified is not running or the Navigator addresses are incorrect.
Action: Check that the Navigator is running by using the STATUS command of the Interchange Control Utility; if necessary, start the Navigator using the START command of the Interchange Control Utility. If it is running and the error persists, contact Oracle Customer Support.