How To Fix MW661 - Supply source determination run. No changes made

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 661

• Message text: Supply source determination run. No changes made

What causes this issue?

Supply source determination successful. The supply sources found are
the same supply sources already assigned to the plants in the items
selected.

System Response

The supply sources for the plants in the items selected were not
changed.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MW661 - Supply source determination run. No changes made ?

  The SAP error message MW661 ("Supply source determination run. No changes made") typically occurs during the supply source determination process in SAP, particularly when using the Material Management (MM) module. This message indicates that the system has executed the supply source determination but did not find any changes or updates to the supply sources for the materials being processed.
  Causes:
  
  No Changes in Master Data: The most common cause is that there have been no changes in the material master data, vendor master data, or purchasing info records that would necessitate a change in the supply source.
  Existing Valid Sources: The system may already have valid supply sources assigned to the materials, and no new sources were found or required.
  Selection Criteria: The selection criteria used for the supply source determination may not have matched any new or updated records.
  Configuration Issues: There may be configuration settings in the supply source determination process that are not set up correctly, leading to no changes being detected.
  
  Solutions:
  
  Check Master Data: Review the material master, vendor master, and purchasing info records to ensure that they are up to date and that any necessary changes have been made.
  Review Selection Criteria: Ensure that the selection criteria used for the supply source determination are appropriate and that they match the records you expect to be processed.
  Run the Process Again: If changes have been made to the master data, re-run the supply source determination process to see if the changes are now recognized.
  Check Configuration: Review the configuration settings related to supply source determination in the SAP system to ensure they are set up correctly.
  Consult Documentation: Refer to SAP documentation or help resources for specific details on the supply source determination process and any known issues or updates.
  
  Related Information:
  
  Transaction Codes: The error may occur during transactions such as ME01 (Maintain Source List), ME02 (Change Source List), or ME03 (Display Source List).
  SAP Notes: Check SAP Notes for any known issues or patches related to supply source determination.
  Debugging: If the issue persists, consider debugging the process to identify any underlying issues in the logic or data processing.
  User Roles and Authorizations: Ensure that the user executing the supply source determination has the necessary authorizations to make changes to the relevant master data.
  
  If the problem continues after checking these areas, it may be beneficial to consult with your SAP support team or a technical consultant for further assistance.