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 wish to use. This can usually be found in the change management documentation or by consulting with the engineering or product management team.
  
  
  Enter the Change Number: When performing the transaction that triggered the error, ensure that you enter the change number in the relevant field. This is often found in the header or item details of the transaction screen.
  
  
  Check Material Master Data: If you are unsure about the change number or if it is not clear which change number to use, you can check the material master data (transaction code MM03) to see the change history and the active change number.
  
  
  Consult with Relevant Teams: If you do not have access to the change numbers or if you are unsure about the process, consult with your engineering or product management team for guidance.
  
  
  Review Configuration: If you believe that the material should not require a change number, review the configuration settings in the SAP system related to change management. This may involve checking the material type settings or the configuration of the change management process.
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MM03 (Display Material), MM02 (Change Material), or CC01 (Create Change Number) to manage materials and change numbers.
  Documentation: Refer to SAP documentation or your organization's internal guidelines on change management processes for more detailed instructions.
  User Roles: Ensure that you have the necessary authorizations to view and enter change numbers in the system.
  
  By following these steps, you should be able to resolve the MM645 error and proceed with your material processing activities.