How To Fix WS564 - Internal error (function module WLF_INV_FOLLOW_DATA_NES_CHECK)

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 564

• Message text: Internal error (function module WLF_INV_FOLLOW_DATA_NES_CHECK)

Self-Explanatory Message

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• What is the cause and solution for SAP error message WS564 - Internal error (function module WLF_INV_FOLLOW_DATA_NES_CHECK) ?

  SAP Error Message:
  
  WS564 Internal error (function module WLF_INV_FOLLOW_DATA_NES_CHECK)
  
  Cause
  The error WS564 with the internal error in function module WLF_INV_FOLLOW_DATA_NES_CHECK typically occurs during workflow processing in SAP, especially related to invoice verification or follow-up data checks in the Logistics Invoice Verification (LIV) component.
  Common causes include:
  
  Inconsistencies or missing data in the workflow container or related tables.
  Corrupted or incomplete workflow data related to invoice follow-up processing.
  Custom enhancements or user exits that interfere with standard workflow processing.
  Issues in the follow-up data check logic within the function module WLF_INV_FOLLOW_DATA_NES_CHECK.
  Transport or system inconsistencies after applying support packages or patches.
  
  
  Explanation of the Function Module
  
  WLF_INV_FOLLOW_DATA_NES_CHECK is a function module used internally by SAP workflow to validate follow-up data for invoice verification.
  It checks the consistency and correctness of the data before allowing the workflow to proceed.
  If it encounters unexpected or inconsistent data, it raises an internal error, resulting in the WS564 message.
  
  
  Solution / Troubleshooting Steps
  
  
  Check Workflow Logs:
  
  Use transaction SWI1 or SWIA to analyze the workflow logs.
  Identify the exact step where the error occurs and check the container data.
  
  
  
  Analyze the Workflow Container:
  
  Use transaction SWO1 to display the workflow object.
  Check the container elements related to invoice follow-up data.
  Look for missing or inconsistent data elements.
  
  
  
  Check for OSS Notes:
  
  Search SAP Support Portal for OSS Notes related to WS564 and WLF_INV_FOLLOW_DATA_NES_CHECK.
  Example notes might address known bugs or provide patches/fixes.
  
  
  
  Debug the Function Module:
  
  If you have development access, set a breakpoint in WLF_INV_FOLLOW_DATA_NES_CHECK.
  Reproduce the error and analyze the data being processed.
  Identify which data element or condition causes the internal error.
  
  
  
  Check for Custom Enhancements:
  
  Review any user exits, BADIs, or enhancements related to invoice verification workflows.
  Disable or adjust custom code if it interferes with standard processing.
  
  
  
  Data Consistency Checks:
  
  Run consistency checks on invoice documents and related tables (e.g., RBKP, RSEG).
  Correct any inconsistencies found.
  
  
  
  Apply SAP Notes / Patches:
  
  If a known bug is identified, apply the relevant SAP Notes or Support Packages.
  
  
  
  Recreate or Reset Workflow Instances:
  
  Sometimes, deleting and restarting the workflow instance for the affected invoice can resolve transient issues.
  
  
  
  
  Related Information
  
  
  Transaction Codes:
  
  SWI1 - Workflow Log
  SWIA - Work Item Administration
  SWO1 - Workflow Object Builder
  SE37 - Function Module Test/Debug
  
  
  
  SAP Modules Involved:
  
  MM (Materials Management)
  FI (Financial Accounting)
  Workflow (Business Workflow)
  
  
  
  Common OSS Notes (examples):
  
  Note 1234567 - (Example) Workflow error WS564 in invoice verification
  Note 7654321 - Fix for internal error in WLF_INV_FOLLOW_DATA_NES_CHECK
  
  
  
  (Note: Replace example note numbers with actual relevant notes from SAP Support Portal.)
  
  Summary
  
  
  
  Aspect
  Details
  
  
  
  
  Error
  WS564 Internal error in function module WLF_INV_FOLLOW_DATA_NES_CHECK
  
  
  Cause
  Data inconsistency or missing data in workflow container during invoice verification
  
  
  Solution
  Analyze workflow logs, debug FM, check container data, apply SAP Notes, fix data issues
  
  
  Related Info
  Workflow transactions (SWI1, SWIA), invoice verification tables, SAP Notes on WS564
  
  
  
  
  If you provide more context (e.g., when the error occurs, transaction used, system version), I can help narrow down the solution further.