Railworks America

I like to drive the Barstow - San Bernardino route and choose the EMD SD40-2 Road Switcher Locomotive with the 53' Double Stack Cars, as I approach Victorville, I pull into a siding and stop the train. I pick another train with the EMD ES44-AC Diesel Locomotive that also has 53" Double Stack Cars, a message pops up and display "Train Derailed at junction... at this lon and lat location". The train hasn't move yet and still have 600' away from the next junction, what caused this to happen?

Is the train parked on a junction?

Make a note of the lat and lon, then go there in the scenario editor.
It may not be your train that's derailing.

I clicked on the 53' Double Stack Cars instead of the train's engine (lead car) and it didn't derail the train. Thanks for all the suggestions though