export ORACLE_SID=orclinst1
-- drop repository if exist
emca -deconfig dbcontrol db -repos drop
---reconfigure again
emca -config dbcontrol db -repos create -cluster
References :
How to manage DB Control 10.2 for RAC Database with emca Doc ID: 395162.1How To Drop, Create And Recreate DB Control In A 10g Database Doc ID: 278100.1
