How To Fix W#421 - Availability checking rule &1, checking group &2 not found

W#421 - Overview

• Message type: E = Error

• Message class: W# -

• Message number: 421

• Message text: Availability checking rule &1, checking group &2 not found

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message W#421 - Availability checking rule &1, checking group &2 not found ?

  The SAP error message W#421 indicates that the system is unable to find the specified availability checking rule and checking group in the configuration. This typically occurs during the availability check process in sales order processing, production planning, or inventory management.
  
  Cause:
  
  Missing Configuration: The availability checking rule or checking group specified in the material master or sales document is not defined in the system.
  Incorrect Assignment: The material may be assigned to a checking group that does not exist or is incorrectly configured.
  Data Migration Issues: If data has been migrated from another system, there may be inconsistencies or missing entries in the configuration.
  
  
  Solution:
  
  
  Check Configuration:
  
  Go to the transaction code OVZB (for availability checking rules) and OVZC (for checking groups) to verify if the rules and groups are defined.
  Ensure that the availability checking rule and checking group specified in the error message exist in the system.
  
  
  
  Define Missing Rules/Groups:
  
  If the required availability checking rule or