How To Fix MM643 - The material type requires a change number

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 643

• Message text: The material type requires 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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM643 - The material type requires a change number ?

  The SAP error message MM643 ("The material type requires a change number") typically occurs when you are trying to create or change a material in the Material Management (MM) module, and the material type you are using is configured to require a change number for certain operations. This is often related to the management of materials that are subject to strict change control processes.
  Cause:
  
  Material Type Configuration: The material type you are working with is set up in the system to require a change number. This is common for materials that are subject to engineering changes or revisions.
  Missing Change Number: When you attempt to create or modify a material, the system expects a change number to be provided, but it is either missing or not entered correctly.
  
  Solution:
  To resolve the MM643 error, you can take the following steps:
  
  
  Enter a Change Number:
  
  When creating or changing the material, ensure that you provide a valid change number in the relevant field. This change number should correspond to an existing change document in the system.
  
  
  
  Check Change Number Configuration:
  
  If you are unsure about the change number requirements, you can check the configuration of the material type in the Customizing settings (transaction code SPRO). Navigate to:
  
  Logistics - General > Material Master > Basic Settings > Material Types > Define Attributes of Material Types.
  
  
  Here, you can see if the "Change Number Required" option is enabled for the material type you are using.
  
  
  
  Create a Change Number:
  
  If you do not have a change number, you may need to create one. This can typically be done through the change management process in your organization, which may involve creating a change request or change order.
  
  
  
  Consult with Your SAP Administrator:
  
  If you are not able to resolve the issue, it may be helpful to consult with your SAP administrator or a colleague who is familiar with the material management processes in your organization. They can provide guidance on how to obtain or create a change number.
  
  
  
  Related Information:
  
  Change Management Process: Understanding the change management process in your organization is crucial, especially if you are working with materials that are subject to strict controls.
  Material Master Data: Familiarize yourself with the material master data fields and their significance, especially those related to change management.
  SAP Documentation: Refer to SAP Help documentation for more detailed information on material types and change management processes.
  
  By following these steps, you should be able to resolve the MM643 error and proceed with your material management tasks in SAP.