How To Fix MU021 - The material category &1 of the material &2 is not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: MU - Maintenance of structured materials

• Message number: 021

• Message text: The material category &1 of the material &2 is not allowed

What causes this issue?

The material &V2& has the incorrect
<DS:GLOS.3526BC12AFAB52B9E10000009B38F974>material category</>. When you
maintain the components of a
<DS:GLOS.3526BBD7AFAB52B9E10000009B38F974>structured material</>, only
the following material category is allowed:
<DS:GLOS.3526BC85AFAB52B9E10000009B38F974>Variant</> of a generic
material
You define the material category when creating a material master record,
after which the material category can no longer be changed.

System Response

The material cannot be processed.

How to fix this error?

Choose or create another material with the correct material category.
<DS:TRAN.MM41>Proceed</>

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MU021 - The material category &1 of the material &2 is not allowed ?

  The SAP error message MU021 indicates that the material category of a specific material is not allowed in the context of the operation you are trying to perform. This error typically arises in scenarios involving inventory management, material master data, or when trying to perform transactions that are not compatible with the material category.
  Cause:
  
  Material Category Restrictions: The material category assigned to the material (e.g., raw materials, finished goods, semi-finished goods) may not be allowed for the specific transaction or process you are attempting to execute.
  Configuration Settings: The system configuration may restrict certain material categories from being used in specific transactions or processes.
  Material Master Data Issues: The material master data may not be set up correctly, leading to the error when trying to perform operations related to that material.
  
  Solution:
  
  Check Material Category: Verify the material category of the material in question. You can do this by navigating to the material master record (transaction code MM03) and checking the details.
  Review Transaction Context: Ensure that the transaction you are trying to perform is compatible with the material category. For example, certain transactions may only be valid for specific material types.
  Configuration Review: If you have access, review the configuration settings in the SAP system (transaction code SPRO) to see if there are any restrictions placed on the material category for the specific transaction.
  Consult with SAP Basis or Functional Team: If you are unable to resolve the issue, consult with your SAP Basis or functional team to check if there are any specific settings or authorizations that need to be adjusted.
  Material Master Data Correction: If the material category is incorrect, you may need to change it (transaction code MM02) or create a new material with the correct category.
  
  Related Information:
  
  Transaction Codes: 
  
  MM03: Display Material Master
  MM02: Change Material Master
  SPRO: Customizing (Configuration)
  
  
  Material Categories: Familiarize yourself with the different material categories and their allowed transactions in your organization.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  
  By following these steps, you should be able to identify the cause of the MU021 error and implement a solution to resolve it.