Seeing a square icon where an image should be?

[vrlab]

My name is Jenny and recently I've programmed an experiment in Direct RT. In this experiment I'm presenting to subjects around 40 face photos in a bmp format. The subjects are asked to click on the RCtrl or the LCtrl, depends on the question presented. But it seems to be an apparent bug. Most of the time the experiment runs well, but sometimes one of the photos doesn't appear (one of the stims in column N in the input, please see attached the input) and instead the subject sees some sort of a small square. It's hard for me to indicate if it is always the same stimulus (I don't think it is). It happens on different computers, and there is no documentation of it in the output. As I said, it happens only part of the times I'm running the experiment. You may well try to run the input and find nothing's wrong. That’s why I'm frustrated.
The version I'm using is 8.00.131. The windows version is XP. Other experiment running on the same computers I'm running don't seem to suffer from that bug….
All the researchers are using the same versions of windows and Direct RT and the same computers…
Is there any chance somone heard something like that before?

thank you!
Jenny

[jarvis24]

Yes, we have heard of this issue and do not have a resolution for the version you are using. We do have a new version though which can be installed to replace your current 2008 version that ought to resolve this. It will be posted publicly soon, but in the meantime, you can get a copy by emailing our sales manager, John Chapman via email through the sales@ address. There is no charge for the update. You might include a link to this support thread when you write him. Definitely try this on just one machine first and, of course, please let me know if that does not fix it (it has for others).

[vrlab]

hopfuly it will work.

thank you!

[vrlab]

Well, I've installed the copy of the new version of direct rt, and now the input doesn't run at all. Only the first screen goes up and that’s it. The program doesn't react to any key except for Esc.
Is it possible that the reason for that is the fact that I haven't entered an authorization code?
thank you
Jenny

[jarvis24]

Can you please post a copy of your input file? Do the samples that come with DirectRT still work ok?

[vrlab]

It’s the same input I've attached in the first thread. I have no idea if the samples work. I'll check it as soon as I'll return to the lab (it's 10:30 pm here…)