Hi Mark,
The client (CLI - sendevent, autorep and suchlike) goes by the AutoServer= parameter in the $AUTOUSER/config.$AUTOSERV (For example: /opt/CA/WorkloadAutomationAE/autouser.PRD/config.PRD) for the Application Server(s) to use. Maybe the agent is still pointing to the old 11.3.6 SP8 scheduler/application server host(s).
Hope that helps.
Best,
Chandru V