We have created two tasks on opensesam. Then we copied them on different PC in order to make several parallel assignments. These 2 tasks are randomized (some participants pass task A then task B, the others task B then task A). We use the last version without installation.
Our tasks sometimes (not always) freeze, opensesam freezes and we have to interrupt the task. It appears more in one order than the other. It seems that there is a "cache" problem.
Have you encountered similar failures?