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[Chiara Modenese <question201807@xxxxxxxxxxxxxxxxxxxxx>]

Question #201807 on Yade changed:
https://answers.launchpad.net/yade/+question/201807

    Status: Open => Answered

Chiara Modenese proposed the following answer:
Hi Diego,

The error you mention occurs simply because you are using an older
version of Yade where gravity was not yet an attribute of
NewtonIntegrator class (exactly what the message tells you). You can
either update to the latest version or use yade-daily from packages.

If, for any reason, you prefer to stick to the version you are currently
working on, you should read something like this in the list of engines:

...
GravityEngine(gravity=(0,-1e3,0)),
NewtonIntegrator(),
...

HTH,
Chiara


On 29 Jun 2012, at 16:41, Diego Fregolente wrote:

> New question #201807 on Yade:
> https://answers.launchpad.net/yade/+question/201807
> 
> Dear all
> 
> I am very sorry if I am going to make a foolish question but, I just
> started to use YADE and I am trying to run some of the examples.
> Unfortunately , when I tried to run the program rotating-cilinder.py I
> got the following error.
> 
> ~/yade/examples/baraban$ yade -x rotating-cylinder.py
> Welcome to Yade 0.60.3
> TCP python prompt on localhost:9000, auth cookie `saskye'
> XMLRPC info provider on http://localhost:21000
> 
> Running script rotating-cylinder.py
> Generating cloud…
> Traceback (most recent call last):
>   File "/usr/bin/yade", line 152, in runScript
>     execfile(script,globals())
>   File "rotating-cylinder.py", line 49, in <module>
> 
>     NewtonIntegrator(damping=.3,gravity=(0,0,-1e3)), # gravity
> artificially high, to make it faster going ;-)
> AttributeError: No such attribute: gravity.
> 
> Please could you tell me how can I fix it?
> 
> with very best regards
> Diego
> 
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