3.3.5.2.2.4.3 Receiving a TXUSER_IMPORT_MTAG_ABORT_TOO_LATE Message.
When the application receives a TXUSER_IMPORT_MTAG_IMPORT_TOO_LATE message, the application MUST perform the following actions:
If the connection state is Awaiting Abort Response:
Set the connection state to Ended.
Return a failure result to the higher-layer business logic.
Otherwise, the message MUST be processed as an invalid message as specified in section 3.1.6.