How To Fix MM660 - The field cannot be changed at the moment due to available stock

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 660

• Message text: The field cannot be changed at the moment due to available stock

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM660 - The field cannot be changed at the moment due to available stock ?

  The SAP error message MM660 typically occurs in the Materials Management (MM) module when a user attempts to change certain fields in a material document or inventory management transaction, but the system prevents the change due to existing stock or inventory constraints. This error is often related to the following scenarios:
  Cause:
  
  Stock Availability: The field you are trying to change is linked to stock levels. If there is stock available in the system, certain fields (like quantity, valuation type, etc.) cannot be modified.
  Document Status: The document you are trying to change may be in a status that does not allow modifications. For example, if the document is already posted or if it is locked for some reason.
  Field Restrictions: Some fields are inherently restricted from being changed once stock has been posted against them. This is a safeguard to maintain data integrity.
  
  Solution:
  
  Check Stock Levels: Verify the stock levels for the material in question. If there is stock available, you may need to adjust or clear the stock before making changes.
  Review Document Status: Check the status of the document you are trying to modify. If it is posted, you may need to reverse the document or create a new document to reflect the changes.
  Use Transaction Codes: Depending on the context, you may need to use specific transaction codes to reverse or adjust stock. For example, use MBST to cancel a material document or MIGO for goods movements.
  Consult with a SAP MM Consultant: If you are unsure about the implications of changing certain fields or if the issue persists, it may be beneficial to consult with a SAP MM consultant or your internal SAP support team.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific notes related to error MM660. SAP frequently updates its knowledge base with solutions and workarounds for common issues.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MIGO (Goods Movement), MB1A (Goods Withdrawal), MB1B (Transfer Posting), and MBST (Cancel Document).
  User Authorizations: Ensure that you have the necessary authorizations to make changes to the material documents or stock levels.
  Training and Documentation: Review SAP training materials or documentation related to inventory management and material document processing to better understand the constraints and processes involved.
  
  By following these steps, you should be able to address the MM660 error and proceed with your inventory management tasks.