401 error in a ranking task

[ancadranca]

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

[jarvis24]

If the error occurs only sometimes, then I would first ask if you have any other simultaneous timers going--e.g., for the que file where it is listed in the experiment (.exp) file. Also--are you able to replicate the crash if you test run the questionnaire on its own within MediaLab? Finally, what version of MediaLab is this (i.e., v20xx.x.x)?

[ancadranca]

Hi!

I read the previous post about the double timed questionnaire embedded in the .exp file, but no, I do not have. Also, I tried replicating the crash on my own computer, then on the University computers where it had happened, but I could not.
The version is V2008.1.13.

Anca

[jarvis24]

Any chance you could zip and attach a copy of your experiment folder?

[ancadranca]

Hi!
I attached the experiment. The crash occurs when participants reach trial.exp, more specifically, as one told me, when she ran out of time. So far it happened only in conditions 5& 6.
Let me know if there is something unclear.
Thank you!

Anca

[jarvis24]

Anca--you've found a bug I believe. I was able to replicate the error under the following condition: I allowed the time to run out on the ranking item *while* one of the other message boxes was open--i.e., either "Move all the items" or the "Instructions" message boxes. Basically resulting in 2 message boxes being open at once. Subsequently, closing one caused the error. Any chance you could confirm this causes the error on your end?