I tied running the file on my computer and got it to work just fine, the appropriate picture A, B, C, or D appeared when I pressed the designated key for each trial of the input file. Do you have a copy of the short and log output files from one of the times you ran the file and got this error? If so, please upload it.

Also, did you see any error messages appear during or after you ran the input file? Can you also upload a copy of the TrackPerfomance.txt file in your DirectRT program folder?