U200 Port in use message found in RKLVLOG, indicating an incorrect default port for TCP/IP profile

After you have completed all installation and configuration of a monitoring agent and try to start the agent, you might find a U200 Port in use abend message in RKLVLOG, indicating a connection failure.

One possible cause of this problem is that the port that is defined for communication among the Tivoli Management Services components was reserved for a different application in the PORT statement of your TCP/IP profile.

If this is the case, perform the following steps:
  1. Verify that the existing port reservation is no longer needed or choose a different port for communication among the Tivoli Management Services components.
  2. Edit your TCP/IP profile to reserve the port for the Tivoli Enterprise Portal started procedure or change your configuration (Tivoli Enterprise Portal Server, Tivoli Enterprise Portal, and monitoring agent) to communicate with the Tivoli Enterprise Portal on a different port.
  3. Stop and then start the started procedures affected by your configuration change.