2843083 - PI SOAP Receiver Adapter - Exception while Setting the Acknowledgement Endpoint for AE

• You have a Process Integration (PI) or Process Orchestration (PO) with a SOAP Receiver Adapter interface in XI 3.0 mode (ABAP proxy integration)
• You have configured the interface to send an acknowledgement back to the Sender system on successful receipt of the message
• After a recent Support Pack Stack (SPS) update, you observe an error with this interface (which previously was working well)
• The error, similar to below, may be visible in the message Audit Log or in Communication Channel Monitoring
  XI_ACK_ERROR SystemAck; com.sap.engine.interfaces.messaging.api.exception.ConfigException: Exception while Setting the Acknowledgement Endpoint for AE
• Default traces collected as per SAP Note: 1514898 - Troubleshooting SAP Process Orchestration / Integration shows the below error:
  xi.ms.XIMessage.setupNextHopAccess Throwing java.lang.NullPointerException: while trying to invoke the method com.sap.aii.af.sdk.xi.mo.xmb.XMBHop.getEngine() of a null object returned from com.sap.aii.af.sdk.xi.mo.xmb.XMBHopListHeader.getNextHop(com.sap.aii.af.sdk.xi.mo.xmb.XMBHop)
  ~apter.xi.ms.AckProcessor.processAck Catching com.sap.engine.interfaces.messaging.api.exception.ConfigException: Exception while Setting the Acknowledgement Endpoint for AE
  at com.sap.aii.adapter.xi.ms.XIMessage.setupNextHopAccess(XIMessage.java:1289)
  at com.sap.aii.adapter.xi.ms.XIMessage.performIRD(XIMessage.java:3910)
  at com.sap.aii.adapter.xi.ms.AckProcessor.createAckMessage(AckProcessor.java:204)

SAP NetWeaver 7.5

Process Orchestration 7.5, PI 7.5, PO 7.5, XI, AEX, ABAP proxy, ECC, technical acknowledgement, hoplist, com.sap.aii.af.sdk.xi.mo.xmb.XMBHop.getHopInfo(), nextHop , KBA , BC-XI-CON-SOP , SOAP Adapter , Problem