Train Cancellation

A cancellation message is sent when the train does not, or will not, complete its scheduled journey.

A train may be cancelled in one of four ways:


 * At activation time ("ON CALL"), usually where the applicable schedule has a STP indicator of "C" - see Planned Cancellations. Trains may be cancelled for other reasons before train has been activated, and when activation occurs, the train will be immediately cancelled with the appropriate reason code
 * At the train's planned origin ("AT ORIGIN")
 * En-route ("EN ROUTE")
 * Off-route ("OUT OF PLAN")

As with all other messages, cancellation messages will only be received for train schedules which have already been activated.

= Data structure =