How To Fix WZRE_PRX051 - Internal error: Message header node is missing in inbound PROXY structure

SAP Error Message - Details

• Message type: E = Error

• Message class: WZRE_PRX - SOA messages from proxy implementations

• Message number: 051

• Message text: Internal error: Message header node is missing in inbound PROXY structure

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WZRE_PRX051 - Internal error: Message header node is missing in inbound PROXY structure ?

  Certainly! Here's a detailed explanation regarding the SAP error message:
  
  SAP Error Message:
  WZRE_PRX051 Internal error: Message header node is missing in inbound PROXY structure
  
  Cause:
  This error typically occurs during the processing of inbound proxy messages in SAP PI/PO or SAP Gateway when the expected message header node is missing in the inbound XML structure that the proxy runtime is trying to process.
  
  The proxy runtime expects a certain XML structure with a message header node (usually the root or a specific node defined in the proxy interface).
  If the incoming XML payload does not contain this node (due to incorrect message format, mapping issues, or incorrect message type), the proxy runtime cannot parse the message correctly.
  This can happen if:
  
  The sender system sends an incomplete or malformed XML message.
  The message mapping or adapter configuration is incorrect.
  The proxy interface definition does not match the actual inbound message structure.
  There is a mismatch between the expected and actual namespaces or message types.
  
  
  
  
  Solution:
  To resolve this error, follow these steps:
  
  
  Check the Incoming XML Payload:
  
  Verify the actual XML message being received.
  Ensure that the message contains the expected message header node as defined in the proxy interface.
  Use transaction SXMB_MONI (for PI/PO) or SLG1 to check the payload.
  
  
  
  Verify Proxy Interface Definition:
  
  Check the proxy interface in transaction SPROXY.
  Confirm the expected XML structure and message header node.
  Make sure the inbound message type matches the proxy interface.
  
  
  
  Check Namespace and Message Type:
  
  Ensure that the namespaces in the incoming XML match those expected by the proxy.
  Mismatched namespaces can cause the proxy runtime to fail to find the header node.
  
  
  
  Review Mapping and Adapter Configuration:
  
  If the message is coming through PI/PO, check the mapping steps.
  Ensure that the mapping does not remove or alter the message header node.
  Check adapter settings to confirm the message is passed correctly.
  
  
  
  Test with a Correct Sample Message:
  
  Use a known good XML message that works with the proxy.
  Compare it with the failing message to identify differences.
  
  
  
  Regenerate Proxy Classes (if applicable):
  
  Sometimes, regenerating the proxy classes in SPROXY can help if the interface has changed.
  
  
  
  Check for SAP Notes:
  
  Search SAP Support Portal for notes related to WZRE_PRX051.
  Sometimes, patches or corrections are available.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SPROXY – Proxy Interface Builder
  SXMB_MONI – PI/PO Message Monitoring
  SLG1 – Application Log
  SE80 – Object Navigator (to check proxy classes)
  
  
  
  SAP Components:
  
  SAP PI/PO (Process Integration / Process Orchestration)
  SAP Gateway (if OData or SOAP proxies involved)
  SAP XI Adapter Framework
  
  
  
  Common Scenarios:
  
  Integration scenarios where external systems send XML messages to SAP proxies.
  Mismatched interface versions between sender and receiver.
  Incorrect message mapping or adapter configuration.
  
  
  
  
  Summary:
  The error WZRE_PRX051 indicates that the inbound proxy message is missing the required message header node, causing the proxy runtime to fail. The solution involves verifying the incoming XML message structure, ensuring it matches the proxy interface definition, checking namespaces, and reviewing mapping and adapter configurations.
  
  If you provide the actual XML payload or interface details, I can help analyze the specific issue further.