How To Fix MM640 - You have entered a different material type; select the views you require

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 640

• Message text: You have entered a different material type; select the views you require

What causes this issue?

Because you have entered a different material type,
the views offered have changed.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM640 - You have entered a different material type; select the views you require ?

  The SAP error message MM640 typically occurs when a user attempts to create or change a material master record and selects views that are not compatible with the material type that has been specified. This can happen in the Material Management (MM) module when the system detects that the views selected do not align with the characteristics of the material type being used.
  Cause:
  
  Incompatible Material Type and Views: The material type you have selected does not support the views you are trying to maintain. For example, if you are trying to select views that are only applicable to a certain material type (like finished goods) while the material type you have chosen is for raw materials, the system will throw this error.
  Configuration Issues: The material type configuration in the system may not be set up correctly to allow the selected views.
  User Error: The user may have mistakenly selected views that are not relevant for the chosen material type.
  
  Solution:
  
  Check Material Type: Verify the material type you are using and ensure it is appropriate for the views you want to maintain. You can do this by checking the material type configuration in the SAP system.
  Select Appropriate Views: When creating or changing a material master record, ensure that you only select views that are compatible with the selected material type. You can refer to the documentation or configuration settings to understand which views are applicable for each material type.
  Consult Configuration: If you have access to the configuration settings, check the material type settings in transaction code OMW0 (for material types) to see which views are allowed for the selected material type.
  User Training: If this error is frequently encountered, consider providing training to users on how to correctly select material types and views.
  
  Related Information:
  
  Material Types: Material types in SAP define the attributes and behavior of materials. Common material types include raw materials (ROH), finished goods (FERT), and trading goods (HAWA).
  Views in Material Master: Common views include Basic Data, Purchasing, Sales, Accounting, and Storage. Each view contains specific data relevant to the material's lifecycle.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) for managing material master records.
  
  If the issue persists after checking the above points, it may be beneficial to consult with your SAP support team or a functional consultant who can provide further assistance based on your specific system configuration.