pyode-user

[Pyode-user] Tutorial 3 - ODE internal error

[German L. M. <ger...@gm...>]

Hi. I'm a new user of pyode and I was trying to run the examples included
the pythod-pyode-doc DEB package available in the Ubuntu repositories.

Tutorials 1 and 2 worked fine, but 3 fails every time I run it. The weird
thing is that the error appears after the explosion, but not necessarily at
the exact time. When it happens, the window closes and the following message
is printed

ODE INTERNAL ERROR 1: assertion "bNormalizationResult" failed in
> _dNormalize4() [../../../../../include/ode/odemath.h]
> Aborted
>

In the ode-users google group some information related to that assertion and
normalization problems, although I don't have the required experience to
fully understand the issue, and hopefully fix it.

http://groups.google.com/group/ode-users/browse_thread/thread/733b2e7339aabadb
http://groups.google.com/group/ode-users/msg/f333e88eab4ecd5b

I'm running Ubuntu 10.04 32-bit.

Thanks for your help,
German

-- 
Germán Larrain

Re: [Pyode-user] Tutorial 3 - ODE internal error

[Ethan Glasser-C. <gl...@cs...>]

On 04/10/2011 05:55 PM, German Larrain M. wrote:
> Hi. I'm a new user of pyode and I was trying to run the examples 
> included the pythod-pyode-doc DEB package available in the Ubuntu 
> repositories.
>
> Tutorials 1 and 2 worked fine, but 3 fails every time I run it. The 
> weird thing is that the error appears after the explosion, but not 
> necessarily at the exact time. When it happens, the window closes and 
> the following message is printed

It looks like this could be caused by a lot of different kinds of 
problems with the simulation itself.  It runs fine on my machine 
(10.10-based, 32 bit).  I wonder if maybe there's a problem with the 
.debs available in the Ubuntu repositories -- built with the wrong 
precision or something?  Could you try building pyode yourself?

Ethan

Re: [Pyode-user] Tutorial 3 - ODE internal error

[German L. M. <ger...@gm...>]

Hi Ethan, thanks for your answer.

I have the following packages installed:
libode1: 2:0.11.1-3
libode-dev: 2:0.11.1-3 both of which seem to be the double-precision
version.
python-pyode: 1.2.0-4+cvs20090320

I will try to build pyode from source, although I feel that may not be the
issue.

Thanks again,
German

On Mon, Apr 11, 2011 at 2:13 PM, Ethan Glasser-Camp <gl...@cs...>wrote:

> On 04/10/2011 05:55 PM, German Larrain M. wrote:
>
>> Hi. I'm a new user of pyode and I was trying to run the examples included
>> the pythod-pyode-doc DEB package available in the Ubuntu repositories.
>>
>> Tutorials 1 and 2 worked fine, but 3 fails every time I run it. The weird
>> thing is that the error appears after the explosion, but not necessarily at
>> the exact time. When it happens, the window closes and the following message
>> is printed
>>
>
> It looks like this could be caused by a lot of different kinds of problems
> with the simulation itself.  It runs fine on my machine (10.10-based, 32
> bit).  I wonder if maybe there's a problem with the .debs available in the
> Ubuntu repositories -- built with the wrong precision or something?  Could
> you try building pyode yourself?
>
> Ethan
>
>


-- 
Germán Larrain