How To Fix MW181 - Supply sources could not be determined for all plants selected

SAP Error Message - Details

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 181

• Message text: Supply sources could not be determined for all plants selected

What causes this issue?

Master data for materials planning or purchasing might possibly be
missing for the specified material or plant.

How to fix this error?

You can enter the missing sources of supply in the plant detail
views or carry out a manual source of supply determination for
external vendors in the plant detail view.
If data that is necessary for automatically determining the source
of supply is missing, maintain this in master data maintenance.

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message MW181 - Supply sources could not be determined for all plants selected ?

  The SAP error message MW181 ("Supply sources could not be determined for all plants selected") typically occurs during the planning or procurement processes when the system is unable to find valid supply sources for the materials in the selected plants. This can happen for various reasons, and understanding the cause is essential for resolving the issue.
  Causes:
  
  
  Missing or Incorrect Master Data:
  
  The material master data may not be set up correctly. This includes missing purchasing info records, source lists, or material master records.
  The material may not be assigned to the relevant plants.
  
  
  
  No Valid Source of Supply:
  
  There may be no valid vendor assigned for the material in the purchasing info record.
  The source list may not contain any valid sources for the material in the selected plants.
  
  
  
  Plant-Specific Settings:
  
  The material may not be available for the specific plants due to plant-specific settings or restrictions.
  The material may be marked as "not relevant for planning" in the