How To Fix MW336 - Either carry out supply source determination or select supplier

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 336

• Message text: Either carry out supply source determination or select supplier

What causes this issue?

You selected automatic supply source determination and manually entered
the source of supply.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Use an alternative.
If you want to enter the source of supply manually, you must enter a
vendor or a plant.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW336 - Either carry out supply source determination or select supplier ?

  The SAP error message MW336 ("Either carry out supply source determination or select supplier") typically occurs in the context of procurement processes, particularly when trying to create a purchase order or a purchase requisition. This error indicates that the system is unable to determine a valid source of supply for the materials or services you are trying to procure.
  Cause:
  
  
  Missing Source of Supply: The system cannot find a valid supplier for the material or service you are trying to procure. This could be due to:
  
  No valid purchasing info record for the material and vendor combination.
  No valid source list entry for the material.
  The material is not assigned to any vendor in the system.
  
  
  
  Incomplete Master Data: The material master or vendor master data may be incomplete or not properly maintained.
  
  
  Source List Configuration: If a source list is required for the material, it may not be configured correctly or may not contain any valid entries.
  
  
  Purchasing Info Record: The purchasing info record may not exist or may not be valid for the specific plant or purchasing organization.
  
  
  Solution:
  To resolve the MW336 error, you can take the following steps:
  
  
  Check Material Master:
  
  Ensure that the material is correctly set up in the material master.
  Verify that the material is assigned to the correct purchasing organization and plant.
  
  
  
  Check Vendor Master:
  
  Ensure that the vendor is set up correctly in the vendor master.
  Verify that the vendor is active and has the necessary purchasing data.
  
  
  
  Create or Update Purchasing Info Records:
  
  If there is no purchasing info record for the material and vendor, create one using transaction code ME11.
  If an info record exists, check its validity and update it if necessary.
  
  
  
  Check Source List:
  
  If a source list is required, check if it exists for the material using transaction code ME01.
  If it does not exist, create a source list entry for the material and vendor.
  
  
  
  Perform Source Determination:
  
  If you want the system to automatically determine the source of supply, you can use transaction code ME57 (Collective Release) or ME41 (Source Determination) to perform source determination.
  
  
  
  Manual Selection:
  
  If automatic source determination is not required, you can manually select a supplier when creating the purchase order or requisition.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  ME11: Create Purchasing Info Record
  ME12: Change Purchasing Info Record
  ME01: Create Source List
  ME03: Display Source List
  ME57: Collective Release
  ME41: Source Determination
  
  
  
  Master Data Maintenance: Ensure that both material and vendor master data are regularly maintained and updated to avoid such errors.
  
  
  Documentation: Refer to SAP documentation or help files for detailed steps on managing purchasing info records and source lists.
  
  
  By following these steps, you should be able to resolve the MW336 error and successfully create your purchase order or requisition.