If this the wrong place to be bringing this up, please tell me. I've done some more work, using Archibald and the occasional hint in OR log files. All the GG-1 locomotives had a problem in the TrainBrakeMaxPressure parameters -- the author did not leave a space between the numeric value and the '#' starting the inline comment. The K4 engine had a CoalBurning parameter that was less than that specified in Rudolph Richter's manual. Two of the GG-1s had incorrect brake slot names. I don't know if any of these problems were preventing the Senator Vincent activity from loading, but after correcting them at least I now have the progress bar at the bottom of the screen. After six minutes it has almost completed, but hangs at that point. I attach the latest log file.