strange ... I updated SAE 3.5p4 on some systems via product update task - and right after the (successfull) task, all clients/agents lost communication to ePO.
Even after a reboot, there was still an error 1912 (communication error between agent <> ePO).
I then tried to run the product update task again - but got an error (not successfull) - BUT - know the agent is communicating again ...!?
(btw. after error 1912 I got error 4256 - but I guess that was only because of running the update task while hafing that communication problem)?