Re: [Visualpython-users] Errors running Vpython on OSX

[Bruce S. <bas...@un...>]

This is definitely unknown behavior. Several people (including me) have run
all the demos on OSX without seeing these symptoms. If you can, you might
try installing on a different Mac to see whether there's something odd with
the particular machine you used first.

Bruce Sherwood

----- Original Message -----
From: "Chris Burns" <bu...@hv...>
To: <vis...@li...>
Sent: Friday, October 04, 2002 1:14 PM
Subject: [Visualpython-users] Errors running Vpython on OSX


> Greetings.
>
> I've just started using VPython on a linux box and got completely hooked
> and started dreaming up all these great demos that would be possible.
> The problem is that we're on a Mac campus, so I needed to get Vpython
> running on OSX. I followed the instructions and everything seemed fine
> until I ran the demo programs.  In any of the demos where there is
> animation (double pendulum, Lorenz, etc), the program bombs at some point
> (not always the same) with a message like:
>
> Traceback (most recent call last):
>   File "doublependulum.py", line 71, in ?
>     atheta2 = -(A*atheta1+C*sin(theta1))/B
> ValueError: unexpected math error
>
> The programs can bomb at different locations (there seems to be no pattern
> that I can see).  Sometimes, the demo will run for 15-20 seconds before
> quitting, sometimes shorter.  The real crazy thing is if I put a trace
> statement just before the offending line and print out the values to the
> screen, it doesn't bomb for a VERY long time (half-hour or so), though it
> slows down the animation.  It then finally bombs with the following
message:
>
> OverflowError: (35, 'Resource temporarily unavailable')
>
> Which seems different than the previous one.  Needless to say, none of
this
> happens in Linux, which makes it doubly frustrating, since I know it
works,
> I just can't show anyone.  I haven't had time to really try and debug
this,
> so I was just wondering if anyone's come accross this and fixed it (I
didn't
> see any mention in the email archives though).
>
> Thanks for any help.
>
> Chris
>
> --
> Chris Burns
> Visiting Assistant Professor
> Dept. of physics and astronomy, Swarthmore College
> cb...@sw...      http://hven.swarthmore.edu/~burns
>
>
>
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