How To Fix WPRO_XI_PROXY021 - Mandatory field is not filled

SAP Error Message - Details

• Message type: E = Error

• Message class: WPRO_XI_PROXY - Messages Service Processing Retail Event

• Message number: 021

• Message text: Mandatory field is not filled

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WPRO_XI_PROXY021 - Mandatory field is not filled ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message: WPRO_XI_PROXY021 - Mandatory field is not filled
  
  Cause:
  This error occurs when a mandatory field in the proxy message structure is not populated before the message is sent or processed. In SAP PI/PO (Process Integration/Process Orchestration) or when using SAP XI proxies, certain fields are defined as mandatory in the proxy interface or the underlying message type. If these fields are left empty or null, the system raises this error to indicate incomplete data.
  Common scenarios causing this error:
  
  The sender application or system did not fill all required fields in the proxy message.
  Mapping or data transformation logic did not populate mandatory fields.
  Incorrect or incomplete data extraction from the source system.
  Custom enhancements or user-exits that inadvertently clear mandatory fields.
  
  
  Solution:
  
  
  Identify the Mandatory Field(s):
  
  Check the proxy interface or message type definition in the Enterprise Services Repository (ESR) or Integration Directory.
  Identify which fields are marked as mandatory.
  
  
  
  Trace the Message Flow:
  
  Use transaction SXMB_MONI (Message Monitoring) or SXI_MONITOR to find the message instance causing the error.
  Check the payload to see which mandatory field is missing.
  
  
  
  Check the Sender System or Mapping:
  
  Verify that the sender system or application is sending all required data.
  Review the mapping logic to ensure mandatory fields are correctly mapped and populated.
  If using custom code (e.g., ABAP proxy, user-exits), debug to ensure mandatory fields are not cleared or left empty.
  
  
  
  Correct the Data:
  
  Ensure that the mandatory fields are filled with valid data before sending the proxy message.
  If the data is missing in the source system, correct it there or handle it in the mapping/transformation.
  
  
  
  Test the Correction:
  
  After fixing the data or mapping, resend the message and verify that the error no longer occurs.
  
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SXMB_MONI - Message Monitoring in PI/PO
  SPROXY - Proxy Builder for ABAP proxies
  SE80 or SE24 - To check proxy classes and interfaces
  ESR (Enterprise Services Repository) - To check message types and interface definitions
  
  
  
  SAP Notes:
  
  Check SAP Notes related to proxy errors or mandatory field validations.
  Example: SAP Note 1680110 - "Mandatory fields in proxy messages"
  
  
  
  Proxy Development:
  
  When developing proxies, always ensure that mandatory fields are handled properly.
  Use the generated proxy classes and methods to set all required fields.
  
  
  
  Integration Scenarios:
  
  This error is common in scenarios involving synchronous or asynchronous proxy communication between SAP systems or between SAP and non-SAP systems via PI/PO.
  
  
  
  
  If you provide the exact proxy interface or message type, I can help you identify the specific mandatory field causing the issue.
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Mandatory field in proxy message not filled
  
  
  Solution
  Identify missing field ? Correct sender data or mapping ? Resend message
  
  
  Tools
  SXMB_MONI, SPROXY, ESR, SE80
  
  
  Notes
  Check SAP Notes for proxy validation errors
  
  
  
  
  Let me know if you need help with a specific proxy or message!