How To Fix WP771 - Receipt & in IDoc & contains an existing subnetwork & for cash register

SAP Error Message - Details

• Message type: E = Error

• Message class: WP - Messages from POS interface

• Message number: 771

• Message text: Receipt & in IDoc & contains an existing subnetwork & for cash register

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WP771 - Receipt & in IDoc & contains an existing subnetwork & for cash register ?

  Certainly! Here's a detailed explanation regarding the SAP error message:
  
  SAP Error Message:
  WP771 Receipt & in IDoc & contains an existing subnetwork &
  
  (Related to Cash Register / POS Integration)
  
  Cause:
  This error typically occurs during the processing of IDocs related to cash register (POS) transactions, especially in scenarios involving the SAP Retail POS Integration or SAP Cash Management.
  
  The message indicates that the receipt number (or document number) contained in the IDoc already exists in the system.
  The term "subnetwork" here refers to a subnetwork of transactions or documents linked to the receipt.
  Essentially, the system detects a duplicate receipt or a receipt that is already processed and linked to an existing subnetwork of transactions.
  This can happen if:
  
  The same receipt is sent multiple times from the POS system.
  There is a mismatch or inconsistency in the receipt numbering or document flow.
  The IDoc processing logic tries to create or link a receipt that already exists in the backend system.
  
  
  
  
  Solution:
  
  
  Check for Duplicate IDocs:
  
  Verify if the same IDoc (or receipt number) has been processed before.
  Use transaction WE02 / WE05 to check the IDoc status and content.
  If duplicates exist, investigate why the POS system is sending the same receipt multiple times.
  
  
  
  Verify Receipt Numbering:
  
  Ensure that the receipt numbers generated at the POS are unique and correctly mapped.
  Check the configuration of the POS system and the interface to SAP to avoid duplicate numbering.
  
  
  
  Check Subnetwork Linkage:
  
  Investigate the existing subnetwork linked to the receipt.
  Use transaction WPOS (if available) or relevant POS transaction codes to check the receipt and its linked documents.
  If the receipt is already processed, no further action may be needed unless a correction is required.
  
  
  
  Reprocess or Delete Duplicate IDocs:
  
  If the duplicate IDoc is erroneous, you may need to delete or archive it.
  If reprocessing is needed, ensure the data is corrected before reprocessing.
  
  
  
  Review Interface and Middleware:
  
  If middleware (like SAP PI/PO) is used, check the mapping and filtering logic to prevent duplicate transmissions.
  
  
  
  SAP Notes and Support:
  
  Check SAP Notes related to POS integration and IDoc processing for any known issues or patches.
  Example SAP Note keywords: "WP771", "POS IDoc duplicate receipt", "Cash register IDoc error".
  
  
  
  
  Related Information:
  
  IDoc Type: Usually related to WPOS (POS Interface) or WPOSCR (Cash Register Interface) IDocs.
  Transactions to Check:
  
  WE02 / WE05 - IDoc monitoring
  WPOS - POS document processing
  WE19 - Test IDoc processing
  
  
  POS Integration: This error is common in SAP Retail environments where POS systems send sales and receipt data to SAP backend.
  Subnetwork Concept: In SAP Retail POS, a subnetwork is a group of related transactions/documents linked to a receipt or business process.
  Duplicate Handling: Implement logic in the POS or middleware to avoid sending duplicate receipts.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Receipt number in IDoc already exists and is linked to an existing subnetwork.
  
  
  Effect
  IDoc processing fails with WP771 error, preventing duplicate receipt creation.
  
  
  Solution
  Check for duplicates, verify receipt numbering, correct or delete duplicate IDocs, review POS interface configuration.
  
  
  Tools
  WE02/WE05 (IDoc monitoring), WPOS (POS document check), WE19 (IDoc test).
  
  
  Related Areas
  SAP Retail POS Integration, Cash Register Interface, IDoc processing.
  
  
  
  
  If you provide the exact IDoc type or scenario, I can help with more specific troubleshooting steps or SAP Notes references.