How To Fix WW657 - No change possible due to existing mat. valuations or char. restrictions

SAP Error Message - Details

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 657

• Message text: No change possible due to existing mat. valuations or char. restrictions

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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 WW657 - No change possible due to existing mat. valuations or char. restrictions ?

  The SAP error message WW657 ("No change possible due to existing material valuations or characteristic restrictions") typically occurs when you attempt to make changes to a material master record that is restricted due to existing valuations or characteristics. This can happen in various scenarios, such as when trying to change the material type, valuation class, or other key attributes of a material that has already been used in transactions.
  Causes:
  
  Existing Transactions: The material has been involved in transactions (e.g., goods movements, sales orders) that have created valuations or characteristics that cannot be changed.
  Valuation Restrictions: The material is assigned to a valuation area or has a valuation class that restricts changes.
  Characteristic Restrictions: If the material is part of a classification system, certain characteristics may be locked due to existing values.
  Material Type Restrictions: Some material types have specific restrictions on what can be changed after the material has been created.
  
  Solutions:
  
  Check Material Usage: Review the material's transaction history to see if it has been used in any transactions. If it has, you may need to create a new material instead of changing the existing one.
  Unlock Characteristics: If the material is classified, check the characteristics assigned to it. You may need to remove or change these characteristics before making changes to the material.
  Change Valuation Class: If the valuation class is causing the issue, you may need to adjust the valuation settings or create a new material with the desired valuation class.
  Consult with SAP Support: If you are unsure about the changes or the implications, it may be beneficial to consult with your SAP support team or refer to SAP documentation for guidance.
  Use Transaction Codes: Use transaction codes like MM02 (Change Material) to check the current settings and restrictions on the material.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM01 (Create Material), MM02 (Change Material), and MM03 (Display Material).
  Material Master Data: Understand the structure of material master data, including views like Basic Data, Purchasing, Sales, Accounting, and Classification.
  SAP Notes: Check SAP Notes for any specific patches or updates related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to make changes to the material master.
  
  By following these steps, you should be able to identify the cause of the WW657 error and take appropriate action to resolve it.