How To Fix WP642 - Internal error: determined supplier item does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: WP - Messages from POS interface

• Message number: 642

• Message text: Internal error: determined supplier item does not exist

Self-Explanatory Message

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• What is the cause and solution for SAP error message WP642 - Internal error: determined supplier item does not exist ?

  SAP Error Message:
  
  WP642 Internal error: determined supplier item does not exist
  
  Cause:
  This error typically occurs in the SAP Materials Management (MM) or Purchasing module during the processing of purchase orders, contracts, or scheduling agreements. The system tries to determine a supplier item (i.e., a vendor-specific material number or supplier's item number) for a material, but it cannot find the corresponding entry in the system.
  More specifically, the error arises when:
  
  The system attempts to find a supplier material number (also called the vendor material number) for a given material and vendor combination.
  The vendor master data or purchasing info record does not contain the supplier item number.
  The info record or source list is missing or incomplete.
  The material master or purchasing info record is not maintained properly for the vendor.
  Customizing or user-exits that determine supplier items are not returning valid data.
  
  
  Explanation:
  In SAP MM, when creating or processing purchasing documents, the system often uses the Purchasing Info Record (PIR) to link a material with a vendor and their specific item number. This supplier item number is important for communication with the vendor and for correct document processing.
  If the system cannot find this supplier item number, it throws the internal error WP642.
  
  Solution:
  
  
  Check Purchasing Info Record:
  
  Go to transaction ME13 (Display Purchasing Info Record).
  Enter the material and vendor.
  Verify if the Vendor Material Number (Supplier Item Number) is maintained.
  If missing, create or update the info record using ME11 or ME12.
  
  
  
  Check Vendor Master Data:
  
  Use transaction XK03 or MK03 to display vendor master.
  Verify if the vendor is correctly maintained and active.
  
  
  
  Check Source List:
  
  Use transaction ME03 to check if the source list exists for the material and vendor.
  Ensure the source list is valid and active.
  
  
  
  Check Material Master:
  
  Use transaction MM03 to check material master data.
  Verify if the material is correctly maintained for purchasing views.
  
  
  
  Check Customizing and User Exits:
  
  If your system uses custom logic to determine supplier items (e.g., user-exits, BADIs), verify that these are working correctly and returning valid supplier item numbers.
  Debug the process if necessary.
  
  
  
  Recreate or Update Info Records:
  
  Sometimes deleting and recreating the purchasing info record can resolve inconsistencies.
  
  
  
  Check for OSS Notes:
  
  Search SAP OSS Notes for WP642 error for your SAP version.
  Apply any relevant SAP Notes or patches.
  
  
  
  
  Additional Information:
  
  
  Transaction Codes:
  
  ME11: Create Purchasing Info Record
  ME12: Change Purchasing Info Record
  ME13: Display Purchasing Info Record
  ME03: Display Source List
  XK03 / MK03: Display Vendor Master
  MM03: Display Material Master
  
  
  
  Related Tables:
  
  EINA / EINE: Purchasing Info Record tables
  LFA1: Vendor Master (General)
  LFM1: Vendor Master (Purchasing Data)
  MARA / MARC: Material Master tables
  
  
  
  SAP Notes:
  
  Check SAP Support Portal for notes related to WP642.
  Sometimes the error is caused by inconsistencies in master data or bugs fixed in patches.
  
  
  
  
  Summary:
  The WP642 error means SAP cannot find the supplier item number for a material/vendor combination. The fix is to ensure that the purchasing info record contains the correct vendor material number and that all related master data is properly maintained. If custom logic is involved, verify it as well.
  
  If you need help with a specific scenario or transaction where this error occurs, please provide more details!