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

SAP Error Message - Details

• 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

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 checking group is missing, you can create it using the appropriate configuration transactions.
  For availability checking rules, use SPRO -> Logistics Execution -> Availability Check -> Define Availability Check.
  For checking groups, use SPRO -> Logistics Execution -> Availability Check -> Define Checking Groups.
  
  
  
  Assign Correct Checking Group:
  
  Check the material master data (transaction code MM03) for the material in question and ensure that the correct checking group is assigned.
  If necessary, update the material master with the correct checking group.
  
  
  
  Review Sales Document Configuration:
  
  If the error occurs during sales order processing, check the sales document type configuration to ensure that the correct availability checking rule is assigned.
  
  
  
  Testing:
  
  After making the necessary changes, test the availability check again to ensure that the error is resolved.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  MM03: Display Material Master
  OVZB: Define Availability Checking Rules
  OVZC: Define Checking Groups
  SPRO: Access to the SAP Reference IMG for configuration
  
  
  
  Documentation: Refer to SAP Help documentation for detailed information on availability checking and configuration settings.
  
  
  Support: If the issue persists after checking the configuration, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to this error message.