Message type: E = Error
Message class: /GSINS/NLGBA_MSG -
Message number: 021
Message text: Message type &1 doesn't exist
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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The SAP error message /GSINS/NLGBA_MSG021 with the description "Message type &1 doesn't exist" typically indicates that the system is trying to reference a message type that has not been defined or is not available in the system. This can occur in various contexts, such as during the processing of inbound or outbound messages in SAP systems, particularly in the context of integration scenarios.
Cause: Missing Configuration: The specified message type has not been configured in the system. Typographical Error: There may be a typo in the message type name being referenced. Transport Issues: The message type may exist in a different environment (e.g., development) but has not been transported to the current environment (e.g., production). Custom Development: If the message type is part of a custom development, it may not have been properly implemented or activated.
Solution: Check Configuration: Go to the relevant configuration transaction (e.g., for IDoc, use transaction WE20 or WE21) and verify if the message
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