Well, after 4 days of further testing and NO HELP from the Forum (S,O&E), it is my conclusion that this IS A BUG.
The Nitty-Gritty:
I have a complete session that runs repeatedly, with no problems.
I have a second session that runs the same way.
They should be the basis for a session that could include at least 2 more trains.
I cannot continue because the AI Commands (Copied from the first to the second session) show up in Surveyor, but will not show up in the combined session when it is played.
Dave
TRS19 Plus
105100
Where oh where is SCS, with it's simple GUI, paths and all the rest ???