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

MM640 - Overview

• 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.

MM640 - Details

• 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