How To Fix WS400 - ************** for function group WLF_GET_INVOICE_NUMBER ***********

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 400

• Message text: ************** for function group WLF_GET_INVOICE_NUMBER ***********

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WS400 - ************** for function group WLF_GET_INVOICE_NUMBER *********** ?

  Certainly! Here's a detailed explanation regarding the SAP error message WS400 related to the function group WLF_GET_INVOICE_NUMBER:
  
  SAP Error Message: WS400
  Context: Occurs in function group WLF_GET_INVOICE_NUMBER
  
  1. Cause of the Error
  
  WS400 is a standard SAP error message related to the invoice number determination process.
  The error typically occurs when the system cannot determine or generate a valid invoice number during the processing of an invoice document.
  This can happen due to:
  
  Missing or incorrect configuration in the number range objects for invoice numbers.
  The number range interval for invoice numbers is exhausted or not maintained.
  Issues in the function module WLF_GET_INVOICE_NUMBER which is responsible for fetching or generating the invoice number.
  Custom enhancements or user-exits that interfere with the standard number assignment logic.
  Authorization issues preventing the number range object from being accessed or updated.
  Database locks or inconsistencies in the number range tables.
  
  
  
  
  2. Solution / How to Fix
  Step 1: Check Number Range Configuration
  
  Go to transaction SNRO or SNUM (depending on SAP version).
  Enter the number range object related to invoice numbers (often WLF_INVNUM or similar).
  Verify that:
  
  Number ranges are defined and active.
  The current number range interval is not exhausted.
  The number range intervals cover the required range for invoice numbers.
  
  
  
  Step 2: Check Function Module / Program
  
  Review the code in function group WLF_GET_INVOICE_NUMBER and the function module WLF_GET_INVOICE_NUMBER.
  Look for any custom modifications or enhancements that might affect number generation.
  Debug the function module to see why it fails to return a valid invoice number.
  
  Step 3: Check Authorizations
  
  Ensure the user executing the process has the necessary authorizations to access and update number ranges.
  Check authorization objects related to number range maintenance (e.g., S_NUMR).
  
  Step 4: Check for Locks or Database Issues
  
  Use transaction SM12 to check for locks on number range tables.
  Use transaction SM13 to check for update failures.
  If locks or update failures are found, resolve them accordingly.
  
  Step 5: SAP Notes and Support
  
  Search for SAP Notes related to WS400 and WLF_GET_INVOICE_NUMBER.
  Apply any relevant SAP patches or corrections.
  
  
  3. Related Information
  
  
  Function Group: WLF_GET_INVOICE_NUMBER
  
  This function group contains the logic for invoice number determination in SAP Logistics Invoice Verification (LIV).
  
  
  Number Range Object:
  
  Usually related to invoice number assignment, e.g., WLF_INVNUM or similar.
  
  
  Transactions to Check:
  
  SNRO - Number range object maintenance.
  SNUM - Number range intervals.
  SM12 - Lock entries.
  SM13 - Update records.
  SE37 - Test function modules (test WLF_GET_INVOICE_NUMBER).
  
  
  
  Common Scenarios:
  
  Invoice number range exhausted.
  Incorrect number range assignment.
  Custom code interfering with standard number assignment.
  Authorization issues.
  
  
  
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WS400 - Invoice number cannot be determined/generated
  
  
  Cause
  Number range exhausted/missing, authorization issues, custom code errors, DB locks
  
  
  Solution
  Check and maintain number ranges, verify authorizations, debug function module, check locks
  
  
  Transactions
  SNRO, SNUM, SM12, SM13, SE37
  
  
  Function Group
  WLF_GET_INVOICE_NUMBER
  
  
  
  
  If you provide the exact error text or log, I can help you with more precise troubleshooting steps.