When Agents are connecting to the Automation Engine, a CP fails when it reaches the maximum connections.
If this occurs you will see the following error listed in the CP:
U00003406 Client connection '39065(10000)' from '? has logged on to the Server.
U00003398 A maximum number of '9999' connections is supported.
U00003407 Client connection '39065(9999)' from '?' has logged off from the Server.
With the corresponding error listed in the PWP:
U01002204 Message ID '4f' at position '32034' has been assigned the invalid length '1002205'.
U00003472 Connection to Server '?' has been closed.