Starting Agents with script-function :MODIFY_SYSTEM fails sporadically

Document ID : KB000087869
Last Modified Date : 14/04/2018
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Error Message :

Starting agents with the script function :MODIFY_SYSTEM("STARTUP", ...) fails sporadically although the Service Manager connection works.

No Error messages are displayed.

Restarting the Server allows the agents to be started and stopped using the Service Manager dialog and System Overview in the User Interface.  However, using the script still intermittently fails and the job containing the command reamins in a status of "Generating".
Cause type:
Root Cause: If an invalid SMGR call is issued by the CP and not returned, all other SMGR calls will not be executed by CP until the open request is returned.
This field was added on 30/03/2017. This article has not been updated yet. Refer to the "Description" or "Workaround" sections for solution information.

Fix Status: Released

Fix Version(s):
Automation Engine 11.2.3 - Available
Automation Engine 11.1.4 - Available
Automation Engine 10.0.8 HF1 - Available
Additional Information:
Workaround :
All CPs must be restarted.