When the LU 6.2
implementation (section 3.2) receives a TXUSER_DTCLURMRECOVERY_MTAG_ATTACH_NOT_FOUND
message, it MUST perform the following actions:
If the connection state is Awaiting Register Response:
a failure result to the higher-layer business logic.
the connection state to Ended.
Otherwise, the message MUST be processed as an invalid message,
as specified in [MS-DTCO],