Random image file errors during a Lexicon Decision Task (case 19670)

Prior to the showing of a word ?Z? or non-word ?/? a cross is presented in the middle of the screen to indicate where the word (or non-word) will shortly appear. The error is occurring with the cross stimulus. In the stim column the cross is identified as ?cross_centered? for all trails. The cross always appears however sometimes it appears twice (instead of once) during a single trail. Randomly on some trails the cross will flash very quickly right before it is presented for the indicated amount of time (500). As I mentioned the trails are all similar in the input file so I do not know the cause of this issue. If I run the input file twice, the cross error will occur on different trails. Potentially suggesting that it is an error with Direct RT and not my input file. However when I run a stroop task on the same laptop (with a similar cross) the error never occurs. Any insight into this issue would be greatly appreciated. Please let me know if you need any clarification into what the issue is.

Please make a copy of your input file, .drt styles file, and your stim folder and either upload them here or send them to [email]support@empirisoft.com[/email] (please reference case 19670). I will be happy to take a look at them.