How To Fix MM645 - For &1, the material may be processed only with a change number

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 645

• Message text: For &1, the material may be processed only with a change number

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM645 - For &1, the material may be processed only with a change number ?

  The SAP error message MM645 indicates that a material can only be processed if a change number is assigned to it. This typically occurs in scenarios where the material is subject to change management, such as when using the Engineering Change Management (ECM) functionality in SAP.
  
  Cause:
  The error arises when you attempt to perform an operation (like creating a purchase order, production order, or any other transaction) on a material that is controlled by change management, but you have not specified a change number. The change number is used to track changes made to the material, ensuring that only the correct version of the material is used in production or procurement processes.
  
  Solution:
  To resolve this error, you need to provide a valid change number when processing the material. Here are the steps you can take:
  
  
  Identify the Change Number: Determine the appropriate change number that corresponds to the version of the material you