How To Fix MH057 - Internal number assignment not supported for this material category

SAP Error Message - Details

• Message type: E = Error

• Message class: MH - Maintain Material Master Data (Retail)

• Message number: 057

• Message text: Internal number assignment not supported for this material category

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MH057 - Internal number assignment not supported for this material category ?

  The SAP error message MH057, which states "Internal number assignment not supported for this material category," typically occurs when there is an attempt to create or manage a material that is assigned to a material category that does not support internal number assignment. This can happen in various scenarios, such as when creating a new material master record or when trying to perform certain transactions related to materials.
  Cause:
  
  Material Category Configuration: The material category you are trying to use is configured to not allow internal number assignment. This is often set in the material type configuration in the SAP system.
  Material Type Settings: The material type associated with the material category may have been set to use external number assignment only.
  User Input Error: The user may have inadvertently selected a material category that does not support internal number assignment.
  
  Solution:
  
  
  Check Material Type Configuration:
  
  Go to the transaction code OMW1 (or SPRO for configuration) to check the settings for the material type.
  Ensure that the material type allows for internal number assignment if that is the desired behavior.
  
  
  
  Change Material Category:
  
  If the current material category does not support internal number assignment, consider using a different material category that does.
  You can do this by creating a new material with a different category or changing the category of the existing material if applicable.
  
  
  
  Use External Number Assignment:
  
  If internal number assignment is not a requirement, you can opt to use external number assignment for the material. This can be done by entering a number manually when creating the material.
  
  
  
  Consult with SAP Basis or Configuration Team:
  
  If you are unsure about the configuration settings or how to change them, consult with your SAP Basis or configuration team for assistance.
  
  
  
  Related Information:
  
  Material Master Data: Understanding how material master data is structured in SAP can help in troubleshooting issues related to material categories and types.
  SAP Documentation: Refer to SAP Help documentation for detailed information on material types and their configurations.
  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.
  
  By following these steps, you should be able to resolve the error message MH057 and successfully manage your material records in SAP.