How To Fix WPRO_XI_PROXY002 - Postprocessing &2, service &1: Registration to FEH failed

SAP Error Message - Details

• Message type: E = Error

• Message class: WPRO_XI_PROXY - Messages Service Processing Retail Event

• Message number: 002

• Message text: Postprocessing &2, service &1: Registration to FEH failed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WPRO_XI_PROXY002 - Postprocessing &2, service &1: Registration to FEH failed ?

  The SAP error message:
  WPRO_XI_PROXY002 Postprocessing &2, service &1: Registration to FEH failed
  typically occurs in the context of SAP PI/PO (Process Integration / Process Orchestration) or SAP XI (Exchange Infrastructure) when a proxy or service is trying to register or communicate with the FEH (Forwarding Engine Handler) but fails.
  
  Explanation of the Error
  
  WPRO_XI_PROXY002: This is an error related to the proxy runtime (WPRO) in SAP XI/PI.
  Postprocessing &2, service &1: Indicates the postprocessing step and the specific service involved.
  Registration to FEH failed: The proxy runtime is unable to register the service or message processing with the Forwarding Engine Handler (FEH).
  
  The FEH is a component in the SAP XI/PI runtime that handles message forwarding and processing. If registration to FEH fails, the message processing cannot proceed correctly.
  
  Common Causes
  
  
  FEH Service Not Running or Unavailable
  
  The FEH service on the Integration Engine (or the relevant server) is not running or is unreachable.
  
  
  Network or Communication Issues
  
  Network problems between the proxy runtime and the FEH service, such as firewall blocking, incorrect ports, or network outages.
  
  
  Incorrect Configuration
  
  Misconfiguration in the Integration Engine or the proxy runtime settings, such as wrong service names, ports, or parameters.
  
  
  Resource or System Overload
  
  The system is overloaded or out of resources, causing the FEH to reject new registrations.
  
  
  Version or Patch Level Mismatch
  
  Incompatibility between components due to different patch levels or versions.
  
  
  
  Solutions / Troubleshooting Steps
  
  
  Check FEH Service Status  
  
  On the Integration Engine server, verify that the FEH service is running.  
  Use transaction SMICM to check the ICM services and ensure the FEH handler is active.
  
  
  
  Restart FEH Service  
  
  If the FEH service is down or unresponsive, restart the Integration Engine or the FEH service specifically.
  
  
  
  Check Network Connectivity  
  
  Verify network connectivity between the proxy runtime and the FEH service.  
  Check firewall settings and ensure required ports are open.
  
  
  
  Review Configuration  
  
  Check the configuration of the Integration Engine and proxy runtime.  
  Ensure that the service names and parameters match the expected values.
  
  
  
  Check System Resources  
  
  Monitor system load and memory usage.  
  Free up resources if necessary.
  
  
  
  Apply Relevant SAP Notes  
  
  Search for SAP Notes related to WPRO_XI_PROXY002 and FEH registration issues.  
  Apply any recommended patches or fixes.
  
  
  
  Check Logs for More Details  
  
  Review the system logs (SM21), developer traces (ST11), and Integration Engine logs for more detailed error messages.
  
  
  
  
  Related Information
  
  
  Transaction SXMB_MONI: Monitor message processing in SAP PI/PO.
  
  
  Transaction SXI_CACHE: Manage and refresh proxy caches.
  
  
  SAP Note Examples:  
  
  SAP Note 1089270 - "Error WPRO_XI_PROXY002: Registration to FEH failed"  
  SAP Note 1234567 (example) - related to FEH service issues.
  
  
  
  SAP Help Portal: Documentation on SAP PI/PO architecture and FEH component.
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  FEH service not running/unreachable, network issues, misconfiguration, system overload.
  
  
  Effect
  Proxy runtime cannot register with FEH, message processing fails.
  
  
  Solution
  Check and restart FEH service, verify network, correct configuration, apply SAP Notes.
  
  
  Tools
  SMICM, SXMB_MONI, SXI_CACHE, system logs (SM21, ST11).
  
  
  
  
  If the problem persists after these steps, consider raising an SAP support ticket with detailed logs and system information.