3.3.5.1.2.4 Receiving a TXUSER_SETTXTIMEOUT_MTAG_TX_NOT_FOUND Message
When the application receives a TXUSER_SETTXTIMEOUT_MTAG_TX_NOT_FOUND (section 2.2.8.3.3.1) message, the application MUST perform the following actions:
If the connection state is Awaiting Set Timeout Response (section 3.3.1.2.4), the application MUST:
Set the connection state to Processing Transaction (section 3.3.1.2.3).
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.