How To Fix WRETAIL_PROXY002 - Invalid input.

SAP Error Message - Details

• Message type: E = Error

• Message class: WRETAIL_PROXY -

• Message number: 002

• Message text: Invalid input.

Self-Explanatory Message

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• What is the cause and solution for SAP error message WRETAIL_PROXY002 - Invalid input. ?

  SAP Error Message:
  
  WRETAIL_PROXY002 Invalid input.
  
  Cause:
  The error message WRETAIL_PROXY002 Invalid input. typically occurs in SAP Retail scenarios, especially when dealing with proxy communication between the front-end (e.g., SAP Retail Store or POS system) and the back-end system. This error indicates that the input data sent to a proxy service or interface is invalid or does not conform to the expected format or structure.
  Common causes include:  
  
  Incorrect or missing mandatory fields in the input data.  
  Data type mismatches or invalid values in the input payload.  
  Issues in the mapping or transformation of data before sending to the proxy.  
  Version mismatch between the proxy interface and the data structure.  
  Corrupted or incomplete data sent from the POS or front-end system.
  
  
  Solution:
  To resolve the WRETAIL_PROXY002 Invalid input. error, follow these steps:
  
  
  Check the Input Data:  
  
  Verify the data being sent to the proxy for completeness and correctness.  
  Ensure all mandatory fields are populated with valid values.  
  Validate data types and formats (e.g., date formats, numeric fields).
  
  
  
  Review Proxy Interface Definition:  
  
  Check the proxy interface (e.g., in transaction SPROXY) to confirm the expected structure and data types.  
  Compare the input data against the interface definition to identify discrepancies.
  
  
  
  Analyze the Error Logs:  
  
  Use transaction SLG1 (Application Log) or ST22 (Dump Analysis) to get detailed error information.  
  Look for any additional messages or stack traces that provide clues.
  
  
  
  Check Version Compatibility:  
  
  Ensure that the front-end system and back-end proxy interfaces are compatible and synchronized in terms of versions and enhancements.
  
  
  
  Debug the Proxy Call:  
  
  If possible, debug the proxy call to see where the input validation fails.  
  Use transaction SPROXY to test the proxy with sample data.
  
  
  
  Correct Data Mapping or Transformation:  
  
  If data is transformed or mapped before sending, verify the mapping logic (e.g., in middleware or BAdIs).  
  Fix any incorrect mappings or missing data assignments.
  
  
  
  Consult SAP Notes:  
  
  Search the SAP Support Portal for notes related to WRETAIL_PROXY002 for any known issues or patches.
  
  
  
  
  Related Information:
  
  SAP Retail Proxy Framework: SAP Retail uses proxy objects to communicate between POS and backend systems. Proper data structure and validation are critical.  
  Transactions:  
  
  SPROXY – Proxy object maintenance and testing.  
  SLG1 – Application log for detailed error messages.  
  ST22 – ABAP dump analysis.  
  
  
  Common SAP Notes:  
  
  Check for notes related to retail proxy errors or specific interface versions.  
  
  
  Middleware/Integration: If middleware (e.g., SAP PI/PO) is involved, verify message mappings and transformations there.
  
  
  If you provide the exact context (e.g., which process or transaction triggers this error), I can help with more specific guidance.