Re: SEVERE: Dbcontrol Repository already exists. Fix the error(s) and run EM Configuration Assistant again in standalone mode.

Posted by ErmanArslansOracleBlog on Oct 03, 2017; 11:48am
URL: http://erman-arslan-s-oracle-forum.124.s1.nabble.com/SEVERE-Dbcontrol-Repository-already-exists-Fix-the-error-s-and-run-EM-Configuration-Assistant-again--tp3716p3727.html

start your listener then...
IF your listener is running, then investigate why dbcontrol thinks that it is not running.. Maybe dbcontrol is looking for the wrong listener.

Investigate, go further a little bit and then update me with your clear and specific question.