How To Fix WG056 - No unique supply source determined

SAP Error Message - Details

• Message type: E = Error

• Message class: WG - Messages for store order and investment buy

• Message number: 056

• Message text: No unique supply source determined

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message WG056 - No unique supply source determined ?

  Certainly! Here's a detailed explanation of the SAP error message WG056 - No unique supply source determined:
  
  SAP Error Message: WG056 - No unique supply source determined
  
  Cause:
  This error occurs during the Goods Issue or Stock Transfer process when the system tries to determine the supply source (storage location or plant) for a material but finds multiple possible supply sources and cannot uniquely identify one.
  In other words, the system is unable to decide from which storage location or plant the material should be issued because:
  
  There are multiple storage locations or plants that can supply the material.
  The system lacks sufficient criteria or configuration to uniquely determine the supply source.
  The supply source determination strategy is ambiguous or incomplete.
  
  
  When does it occur?
  
  During stock transfer postings (e.g., transfer posting from one plant/storage location to another).
  During goods issue for a production order, sales order, or reservation.
  When the system tries to find the source of supply for a material in a warehouse or plant.
  
  
  Typical Scenarios:
  
  Multiple storage locations in the issuing plant have stock of the material.
  Multiple plants are possible supply sources (e.g., subcontracting or stock transfer scenarios).
  The system’s supply source determination strategy is not properly configured or is ambiguous.
  No clear priority or rule exists to select one supply source over others.
  
  
  Solution:
  
  
  Check Supply Source Determination Configuration:
  
  Review the supply source determination strategy in Customizing:
  
  IMG Path:
  
  Logistics Execution ? Warehouse Management ? Strategies ? Define Supply Source Determination
  
  
  Ensure that the strategy is set up to uniquely identify a supply source based on criteria such as:
  
  Storage location priority
  Plant priority
  Stock availability
  Other custom rules
  
  
  
  
  
  Check Material Master Data:
  
  Verify the storage locations assigned to the material in the issuing plant.
  Check if the material is available in multiple storage locations with stock.
  If multiple storage locations have stock, consider:
  
  Setting up storage location determination rules.
  Using stock removal strategies (e.g., FIFO, LIFO, fixed bin).
  
  
  
  
  
  Check Reservation or Order Details:
  
  If the goods issue is for a production order or reservation, check if the reservation specifies a storage location.
  If not, the system tries to determine the source automatically and may fail if ambiguous.
  
  
  
  Manual Intervention:
  
  During the goods issue or transfer posting, manually specify the storage location or supply source if the system cannot determine it automatically.
  
  
  
  Use Stock Removal Strategies:
  
  Implement stock removal strategies in Warehouse Management to guide the system on which stock to pick first.
  
  
  
  Check for User Exits or Enhancements:
  
  Sometimes custom logic affects supply source determination. Review any user exits or BAdIs related to supply source determination.
  
  
  
  
  Additional Information:
  
  
  Transaction Codes:
  
  LT03 - Create Transfer Order (can specify storage location)
  MB1B - Transfer Posting
  MIGO - Goods Movement
  COHV - Production Order Processing
  
  
  
  Related Notes and Documentation:
  
  SAP Note 123456 (example) might provide specific fixes or patches.
  SAP Help Portal on Warehouse Management and Supply Source Determination.
  
  
  
  Debugging Tips:
  
  Use transaction ST22 to check for dumps related to this error.
  Use debugging to check how the system tries to determine the supply source.
  Check the supply source determination strategy assigned to the warehouse number or plant.
  
  
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WG056 - No unique supply source determined
  
  
  Cause
  Multiple possible supply sources exist; system cannot uniquely identify one
  
  
  Solution
  Review and configure supply source determination strategy; specify storage location manually; check material master and stock; implement stock removal strategies
  
  
  When it occurs
  Goods issue, stock transfer, production order goods issue
  
  
  Related Transactions
  MIGO, MB1B, LT03, COHV
  
  
  
  
  If you provide more context (e.g., transaction, process step), I can help with more specific guidance!