We have an agent that has been running, working and submitting jobs for quite some time. All of a sudden the agent communication stopped working and all we can see is an error message in the transmitter log but not really sure what it means.
cybermation.library.communications.CybConversationException: Error sending message: NAK
Release : 11.x, 12.x
Component : CA Workload Automation System Agent
The error means agent is unable to send a 'NAK' to the scheduler to acknowledge that a message was received by the agent.
Possible causes are;
- invalid manager / address.
The scheduling manager address is invalid in agent's agentparm.txt file.
Update the address (communication.manageraddress_<n> parameter) in agentparm.txt file.
Restart the agent for the change to take effect.