Hello everyone,
Sometime you got error in SAP PO SOAP Adapter like: “500 Internal Server Error” when you try to access to http://hostname:Port/XISOAPAdapter/MessageServlet?ximessage=true

1. Identify issue
Check system logs: NWA->Troubleshooting->Logs and Traces->Log Viewer

2. Solve issue
Go to NWA: NWA->search “Start & Stop” application, choose “Java Application”

Restart SOAP Adapter:
com.sap.aii.adapter.soap.app
com.sap.aii.adapter.soap.lib



In some cases, you also need refresh CPA cache
For more detail about SAP PO and SAP S4, ECC ABAP proxy configuration, you can check this topic
Thank and enjoy,
Cuong Dang