When creating a VSTP like that it's easy to type in an incorrect STANOX if you're not just copying an existing schedule. Most of the time a simple error of that type isn't an issue but it can cause problems if, for example, you accidentally type 07361 (Mossend PD Stirling) instead of 07360 (Mossend Down Yard) and don't notice before uploading the schedule to the mainframe, as it would mean the train could not be consisted in TOPS by the operator because the system thinks the loco and wagons are in the wrong place.
Sometimes the wrong STANOX is requested by the TOC/FOC on the VSTP request form - and it'll be entered verbatim - and sometimes there isn't one that exactly fits where the train is really going, so you just have to pick one reasonably close. As long as the STANOXes used in between are valid links then you can put in whatever you like... I could knock you up a VSTP schedule from 07335 (Caldercruix Crossover) to 01003 (Thurso UKAEA) via 08651 (Stranraer Town Freight Depot) and have it showing live on Real Time Trains in about 2 minutes if I wanted.
