Message type: E = Error
Message class: MY_CATS - Message Class for CATS notebook
Message number: 004
Message text: The message class & does not exist
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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
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