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

MW661 - Overview

• 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.

MW661 - Details

• 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