How To Fix BUCC104 - Library &1/Rule &2: The message class is not set

SAP Error Message - Details

• Message type: E = Error

• Message class: BUCC - Message class for Consistency checks

• Message number: 104

• Message text: Library &1/Rule &2: The message class is not set

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message BUCC104 - Library &1/Rule &2: The message class is not set ?

  The SAP error message BUCC104 indicates that there is an issue with the configuration of a message class in the context of Business Configuration (BC) or Business Rules Framework (BRF+). Specifically, the error states that the message class is not set for a particular library and rule.
  Cause:
  The error typically arises due to one of the following reasons:
  
  Missing Configuration: The message class has not been defined or assigned in the relevant configuration settings for the library or rule.
  Incorrect Settings: The settings for the library or rule may be incorrectly configured, leading to the system being unable to find the appropriate message class.
  Transport Issues: If the configuration was transported from one system to another (e.g., from development to production), the message class may not have been included in the transport request.
  
  Solution:
  To resolve the BUCC104 error, you can follow these steps:
  
  
  Check Configuration:
  
  Navigate to the relevant configuration area in SAP where the library and rule are defined.
  Ensure that the message class is properly set for the specified library and rule. You may need to create or assign a message class if it is missing.
  
  
  
  Define Message Class:
  
  If a message class does not exist, you can create one using transaction code SE91 (Message Class Maintenance).
  Define the necessary messages that will be used in the context of the library and rule.
  
  
  
  Review Transport Requests:
  
  If the issue arose after a transport, check the transport request to ensure that all necessary objects, including the message class, were included.
  If the message class is missing, you may need to transport it separately or adjust the transport request.
  
  
  
  Testing:
  
  After making the necessary changes, test the library and rule again to ensure that the error is resolved.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for additional guidance on configuring message classes and handling errors related to Business Configuration.
  
  
  
  Related Information:
  
  Transaction Codes: SE91 (Message Class Maintenance), SE80 (Object Navigator), and SPRO (Customizing Implementation Guide).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the BUCC104 error in your SAP system.