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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM079 - The entry of a value set is not allowed ?

  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 string where a numeric value is expected).
  Custom Validation Rules: There may be custom validation rules implemented in the system that restrict certain entries.
  
  Solutions:
  
  Check Allowed Values: Review the allowed values for the field in question. This can often be done by checking the field's documentation or configuration settings in the SAP system.
  Review Field Configuration: If you have access, check the configuration settings for the field in transaction codes like SPRO (SAP Project Reference Object) to see if there are any restrictions in place.
  User Authorizations: Ensure that the user has the necessary authorizations to enter the value. This may require coordination with your SAP security team.
  Correct Data Entry: Make sure that the value being entered is correct and matches the expected format and data type.
  Consult with IT Support: If the issue persists, consult with your SAP support team or IT department for further assistance. They may need to investigate custom code or validation rules that could be causing the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material) to understand where the error might be occurring.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions.
  Documentation: Review SAP documentation or help files related to the specific module or transaction you are working with for more detailed information on field restrictions and configurations.
  
  By following these steps, you should be able to identify the cause of the MM079 error and take appropriate action to resolve it.