Hi,

I'm having subjects rank some items in a timed ranking task. The .exp file has a (d-120) parameter. However, I've had 3 participants whose medialab file simply crashed. The error read: can't show non-modal form when modal form is displayed. Additionally, no data was saved up until that moment.
Could you tell me why this is happening and what I can do to prevent it?

Thank you,
Anca