How To Fix MM420 - &: & physical inventory indicator set for unrestricted-use stock

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 420

• Message text: &: & physical inventory indicator set for unrestricted-use stock

Self-Explanatory Message

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• What is the cause and solution for SAP error message MM420 - &: & physical inventory indicator set for unrestricted-use stock ?

  The SAP error message MM420 indicates that there is a problem related to the physical inventory indicator being set for unrestricted-use stock. This error typically arises during inventory management processes, particularly when trying to perform physical inventory counts or adjustments.
  Cause:
  The error MM420 occurs when the system detects that the physical inventory indicator is set for stock that is classified as unrestricted-use stock. This can happen for several reasons:
  
  Incorrect Configuration: The physical inventory indicator may not be correctly configured for the material or plant in question.
  Stock Type Misalignment: The stock type being counted may not be compatible with the physical inventory process.
  Inventory Document Issues: There may be issues with the inventory document itself, such as it being in a status that does not allow for the processing of unrestricted stock.
  
  Solution:
  To resolve the MM420 error, you can take the following steps:
  
  
  Check Material Master Settings:
  
  Go to the material master record for the affected material and check the inventory management views.
  Ensure that the physical inventory indicator is set correctly for the material.
  
  
  
  Review Physical Inventory Document:
  
  Check the status of the physical inventory document. Ensure that it is not locked or in a status that prevents processing.
  If necessary, delete and recreate the physical inventory document.
  
  
  
  Adjust Stock Types:
  
  If the stock is not supposed to be unrestricted, consider moving it to a different stock type that is compatible with physical inventory processes.
  
  
  
  Consult Configuration:
  
  If you have access to configuration settings, review the settings for physical inventory in the IMG (Implementation Guide) under Materials Management. Ensure that the settings align with your business processes.
  
  
  
  Check for User Exits or BAdIs:
  
  If there are any custom developments (user exits or BAdIs) that might affect the physical inventory process, review them to ensure they are not causing the issue.
  
  
  
  SAP Notes and Support:
  
  Check the SAP Support Portal for any relevant notes or patches that may address this specific error. Sometimes, SAP releases updates that fix known issues.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like MI01 (Create Physical Inventory Document), MI02 (Change Physical Inventory Document), and MI03 (Display Physical Inventory Document) to manage physical inventory processes.
  Documentation: Refer to SAP Help documentation for detailed guidance on physical inventory processes and error handling.
  User Forums: Consider checking SAP community forums or user groups for discussions related to MM420, as other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to identify the root cause of the MM420 error and implement a solution to resolve it.