If you open the TrackPerformance.txt file and find both Error 53 and Error 5 notices, it may be due image files in your Stim folder that are 24-bit depth. You can check this if you right-click your image files, click on Properties, and click on the Details tab.
DirectRT tends to work with images of an 8-bit depth. It's not too difficult to do this conversion. Here are the steps, which you can also find in here in the online DirectRT manual (http://www.empirisoft.com/directrt/h...ge_files.htm):
1) Donwload the free program IrfanView at http://www.irfanview.com/.
2) Open Irfanview and open the image that you want to change.
3) From the Image Menu, select Decrease Color Depth.
4) Select 256 colours and save your image.
That should do it! Try it out and see if they show up in your DirectRT input file.