How To Fix MM644 - 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: 644

• Message text: The material may be processed only with a change number

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM644 - The material may be processed only with a change number ?

  The SAP error message MM644 ("The material may be processed only with a change number") typically occurs in the context of materials that are subject to change management. This means that the material in question has been configured to require a change number for certain operations, such as procurement, production, or inventory management.
  
  Cause:
  
  Change Management Configuration: The material is set up in the system to require a change number for processing. This is often used in industries where strict control over changes to materials is necessary, such as pharmaceuticals or aerospace.
  Missing Change Number: The user is attempting to perform an operation (like creating a purchase order, production order, etc.) without providing a valid change number.
  Material Status: The material may have a status that restricts its use until a change number is assigned.
  
  
  Solution:
  
  Provide a Change Number: When performing the operation, ensure that you enter a valid change number. This can usually be