How To Fix MY_CATS004 - The message class & does not exist

MY_CATS004 - Overview

• Message type: E = Error

• Message class: MY_CATS - Message Class for CATS notebook

• Message number: 004

• Message text: The message class & does not exist

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 MY_CATS004 - The message class & does not exist ?

  The SAP error message MY_CATS004, which states "The message class & does not exist," typically indicates that the system is trying to reference a message class that has not been defined or is not available in the SAP system. This can occur in various contexts, such as during the execution of a program, transaction, or report.
  
  Cause:
  
  Missing Message Class: The specified message class (in this case, represented by the & symbol) has not been created or is not available in the system.
  Incorrect Configuration: The system might be configured incorrectly, leading to a reference to a non-existent message class.
  Transport Issues: If the message class was supposed to be transported from another system (like Development to Production) and the transport did not occur, it may lead to this error.
  Custom Development: If the error arises from custom development, the developer may have referenced a message class that was not created.
  
  
  Solution:
  
  
  Check Message Class: 
  
  Use transaction