We get the error 'Unable to establish the connection with the database. ORA-12541: TNS: No Listener.' This is common when attempting to run the URT from the Enforce server fails each time attempted.
Error: unable to establish db connection for user protect: ORA-12541: TNS:no listener
It could be possible that the Listener service is not running on the Oracle Server.
To resolve the issue, follow the steps below: