Error Message :
This is just a short excerpt from the logs after for example a new agent was started with no entry in section: [CP_LIST]
20170928/103109.167 - U02000004 Connection to Server 'AUTOMIC#CP001' successfully created.
20170928/103109.167 - U03000009 Partner is not a communication process (CP)
20170928/103109.168 - Failed to connect to any CP.
If an Agent is started in verson 12.1 with a Java Control Process (JCP) as the first communication process instead of as a normal Communicaiton Process (CP), new Agents (which have no entry in the section [CP_LIST]), or CALL API'x are not able to connect to the Automation Engine (AE).
OS Version: N/A
Root Cause: This happens because the socket connection to the JCP is successfully established, but no messages can be sent. The CP Port is blocked by the first started JCP.
Update to a fix version listed below or a newer version if available.
Fix Status: Released
Component(s): Automation Engine and Initial data
Automation Engine 12.1.0.HF4 – Available
Stop the JCP and CP processes and start the CP first.