How To Fix MM079 - The entry of a value set is not allowed

MM079 - Overview

• Message type: E = Error

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

• Message number: 079

• Message text: The entry of a value set is not allowed

What causes this issue?

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

System Response

How to fix this error?

Enter a specific material number.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MM079 - Details

• The SAP error message MM079 ("The entry of a value set is not allowed") typically occurs in the Materials Management (MM) module when a user attempts to enter a value that is not permitted for a specific field or data entry. This can happen in various contexts, such as during the creation or modification of material master records, purchase orders, or other related transactions.
  Causes:
  
  Value Set Restrictions: The field you are trying to enter a value for may have predefined value sets or ranges that do not include the value you are attempting to enter.
  Field Configuration: The field may be configured in such a way that it only accepts certain values based on the configuration settings in the system.
  User Authorizations: The user may not have the necessary authorizations to enter certain values in the system.
  Data Type Mismatch: The value being entered may not match the expected data type (e.g., entering a