3586283 - SAP PO: Synchronous Acknowledgement Errors in Asynchronous Processes

Encountering unexpected errors related to synchronous acknowledgements within the SAP Process Orchestration (PO) system.

Want to eliminate the errors currently associated with synchronous acknowledgements in the asynchronous processes. 

Acknowledgement not possible for synchronous message.
close    sessionContext_: 903907822
with (com.sap.aii.adapter.jms.core.connector.SessionContextImpl@35e089ee)
Catching 
com.sap.engine.interfaces.messaging.api.exception.MessagingException: Acknowledgement not possible for synchronous message.
at com.sap.aii.adapter.xi.ms.AckProcessor.processAck(AckProcessor.java:236)
at com.sap.aii.adapter.xi.ms.AckProcessor.run(AckProcessor.java:179)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:185)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:302)
with (com.sap.aii.adapter.jms.core.connector.SessionContextImpl@35e089ee)
Acknowledgement handling failed for type AckNotSupported. Reason: 
com.sap.engine.interfaces.messaging.api.exception.MessagingException: Acknowledgement not possible for synchronous message.
Returning resource com.sap.aii.adapter.jms.core.connector.SessionContextImpl@35e089ee to the pool
Cannot report error to audit log. AuditMsgKey is null 

SAP NetWeaver 7.5

com.sap.engine.interfaces.messaging.api.exception.MessagingException: Acknowledgement not possible for synchronous message, Synchronous Acknowledgement, Asynchronous Processes. , KBA , BC-XI-CON-MSG , Messaging System , Problem