79-80 Timetables

Very comprehensive and enjoyable simulation if a little difficult! However, I have 2 queries which I believe have been discussed already but I am still a little perplexed:

1) 4S19, booked to terminate at Carlisle to change engines prior to forward working via Dumfries. New loco has to be diesel as line from Gretna Jn. to Dumfries is not electrified. Engine from Wapping sidings is shown as diesel and yet when coupling is complete, the forward timetable assigned to 4S19 will not accept that the new loco is diesel and forward working is impossible. I get round this by abandoning the timetable and letting the train run without a timetable, which is not as it should be. Help here would be appreciated.

2) The 79-80 Carlisle timetables offer scenarios with 'Main Lines at Upperby closed' and 'Main lines at Kingmoor closed'. Although the Upperby closure is workable, the Kingmoor closure presents problems which are not easily resolved. I believe the Kingmoor closure has already been discussed somewhere but I'm not sure of the outcome of this discussion. Of course, I normally use the simulation with no closures or restrictions!

I do apologise if these queries have already been answered but I haven't yet seen a clear and explicit resolution.

No saved game yet! Working through yet another enjoyable 79-80 game; when I reach operation of 4S19 in sim., will hopefully be able to send saved game. However, I would point out that the changeover loco OS19 from Wapping sidings shows diesel traction!