Fatal python error: (pygame parachute) Bus Error

[Brendan Tomoschuk]

Hi!

I'm running an experiment on Psychopy Version 1.80.06 that uses an ioLab button box connected to a marantz sound recorder to measure naming latencies in response to pictures interleaved with videos.

It randomly crashes, throwing the error "Fatal python error: (pygame parachute) Bus Error" in the middle of blocks. It doesn't always happen, doesn't happen in response to specific stimuli, or anything like that i can find. I followed every thread I've found on here related to this error in hopes of fixing the problem but I haven't managed to do it.

So far I've:

-decreased the resolution of the photos

-stripped the video of the audio and played the audio separately (since the audio format of videos gives some people trouble)

-switched audioLib to be pyo before pygame

Despite all of this, the experiment quits somewhat frequently, and always with this error. Might it be anything else? I appreciate any help, and will happily send my code along if it helps.

Thanks a lot!

Brendan

[Brendan Tomoschuk]

I should also note that it doesn't seem to crash when the recorder is not actually on. Since I'm measure naming latencies, that solution isn't viable. 

I've also been trying to work in an updated version of psychopy, but there are some compatibility issues with the experiment and newer versions of psychopy.

[Jonathan Peirce]

It's basically impossible to tell from this, but if the problem is only when you have an external piece of hardware turned on then it sounds like some incompatibility with some custom code you've written to communicate with that box?

Jon

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[Brendan Tomoschuk]

Hi Jon,

Thanks for replying! There seems to have been some kind of problem between sound files (.wav) being played by psychopy, the button box, and the external recorder...In trying to identify the source of the problem, I converted all of the sound files to .aic, and for some reason it works reliably. I couldn't get any other sound format to work. I've run experiments on psychopy with all of the same equipment/types of files...just never all at the same time, so there had to have beeb some interactive problem that was solved by changing one of the three things.

Sorry if request for help was unclear. As you can imagine, the error message was quite unclear itself!

Brendan