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