Oracle Message TNS-00008 - INTCTL: could not contact destination Navigator

ERRORINTCTL: could not contact destination Navigator
CAUSEConnection could not be properly established to a Navigator. This may be because the Navigator specified is not running or the Navigator addresses are incorrect.
ACTIONCheck 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.