How To Fix WZRE_PRX_MAPPING056 - ActionCode '01' (Create): InvoiceID must be initial

SAP Error Message - Details

• Message type: E = Error

• Message class: WZRE_PRX_MAPPING - Messages for Proxy Mappings

• Message number: 056

• Message text: ActionCode '01' (Create): InvoiceID must be initial

Self-Explanatory Message

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• What is the cause and solution for SAP error message WZRE_PRX_MAPPING056 - ActionCode '01' (Create): InvoiceID must be initial ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WZRE_PRX_MAPPING056 ActionCode '01' (Create): InvoiceID must be initial
  
  Cause:
  This error occurs during the processing of proxy messages or IDoc inbound processing related to invoice creation. The message indicates that when the system tries to create an invoice (ActionCode '01'), the field InvoiceID is expected to be initial (empty or blank) but it is not.
  
  InvoiceID is typically a unique identifier for an invoice.
  For creation actions, the system expects that the InvoiceID is not yet assigned (initial), because the system will generate it.
  If the InvoiceID is already filled in the inbound data for a create action, the system raises this error to prevent conflicts or duplicate entries.
  
  
  When does it happen?
  
  During inbound processing of proxy messages or IDocs related to invoice creation.
  When the inbound data incorrectly contains an InvoiceID for a create operation.
  Possibly due to incorrect mapping or data preparation in the sending system or middleware.
  
  
  Solution:
  
  
  Check the inbound data:
  
  Verify the payload or IDoc segments that contain the InvoiceID.
  For ActionCode '01' (Create), ensure that the InvoiceID field is empty or initial.
  
  
  
  Correct the mapping or data preparation:
  
  If you are using middleware (like SAP PI/PO or CPI), adjust the mapping logic to clear the InvoiceID field for create actions.
  If the data is coming from an external system, coordinate with the sender to send the InvoiceID as blank for create operations.
  
  
  
  Review the proxy or IDoc processing logic:
  
  Check the function module or BAdI implementation that processes the inbound message.
  Ensure that the logic aligns with the requirement that InvoiceID must be initial for create.
  
  
  
  Testing:
  
  After correction, test the inbound processing again to confirm that the error no longer occurs.
  
  
  
  
  Related Information:
  
  ActionCode '01' usually means Create in SAP IDoc or proxy processing.
  InvoiceID is often a key field and must be handled carefully to avoid duplicates.
  Similar errors may occur for other action codes if mandatory fields are incorrectly populated.
  Check SAP Notes or OSS messages if this error persists after correcting the data.
  Common modules involved: FI-CA (Contract Accounts Receivable and Payable), SD Billing, or custom invoice processing proxies.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  InvoiceID must be initial for ActionCode '01' (Create)
  
  
  Cause
  InvoiceID field is filled when it should be empty for create action
  
  
  Solution
  Ensure InvoiceID is blank in inbound data for create; fix mapping or sender data
  
  
  Related Areas
  Proxy/IDoc inbound processing, invoice creation, middleware mapping
  
  
  
  
  If you provide more context (e.g., module, interface type), I can help with more specific troubleshooting steps.