How To Fix WY100 - Supplier & not assigned to supplier hierarchy

SAP Error Message - Details

• Message type: E = Error

• Message class: WY - Supplier Master

• Message number: 100

• Message text: Supplier & not assigned to supplier hierarchy

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WY100 - Supplier & not assigned to supplier hierarchy ?

  SAP Error Message:
  
  WY100 - Supplier & not assigned to supplier hierarchy
  
  Cause:
  This error occurs when a supplier is not assigned to a supplier hierarchy in SAP. Supplier hierarchies are used in SAP to group suppliers for reporting, analysis, or control purposes. If a process (such as a purchase order, invoice verification, or reporting) requires the supplier to be part of a supplier hierarchy and the supplier master data lacks this assignment, the system throws this error.
  
  Explanation:
  
  Supplier hierarchies are maintained in SAP to structure suppliers into groups.
  Certain business processes or custom validations may require that suppliers be assigned to a hierarchy.
  If the supplier is missing this assignment, the system cannot proceed and issues the WY100 error.
  
  
  Solution:
  
  
  Assign the Supplier to a Supplier Hierarchy:
  
  Go to the supplier master data transaction (e.g., XK02 or MK02).
  Navigate to the Purchasing Data or Supplier Hierarchy tab (depending on SAP version and configuration).
  Assign the supplier to the appropriate supplier hierarchy node.
  Save the changes.
  
  
  
  Check Configuration:
  
  Verify if the supplier hierarchy is mandatory for the business process.
  If this is a custom validation, check with your SAP functional consultant or developer if the validation can be adjusted or bypassed.
  
  
  
  Verify Hierarchy Setup:
  
  Use transaction S_ALR_87012086 or similar to display supplier hierarchies.
  Ensure the hierarchy exists and is correctly maintained.
  
  
  
  Reprocess the Transaction:
  
  After assigning the supplier to the hierarchy, retry the transaction that caused the error.
  
  
  
  
  Related Information:
  
  
  Supplier Hierarchy Maintenance:
  
  Supplier hierarchies are maintained in SAP under Logistics ? Materials Management ? Purchasing ? Master Data ? Supplier Hierarchy or via IMG path:
  
  Materials Management ? Purchasing ? Supplier Hierarchy ? Define Supplier Hierarchy
  
  
  Transactions:
  
  XK01/XK02/XK03 – Create/Change/Display Supplier Master (Central)
  MK01/MK02/MK03 – Create/Change/Display Vendor (Purchasing)
  S_ALR_87012086 – Display Supplier Hierarchy
  
  
  
  Notes:
  
  This error might be triggered by custom user-exits or BAdIs that enforce supplier hierarchy assignment.
  Check if any custom validations are active in your system.
  
  
  
  
  Summary:
  
  Cause: Supplier not assigned to a required supplier hierarchy.
  Solution: Assign the supplier to the appropriate supplier hierarchy in the supplier master data.
  Check: Supplier hierarchy setup and any custom validations.
  
  If you continue to face issues, consult your SAP MM functional consultant or check for custom code that enforces this validation.