[yt-users] error "Zero-length selections are not allowed"

[Matthew Turk]

Hi JC,

Looks like a problem with detecting the fields.  If you send me info
off-list on how to replicate this, I can see where exactly the field
detection is going awry, and how to fix it.

-Matt

On Sat, Mar 24, 2012 at 4:56 AM, Jean-Claude Passy <jcpassy at gmail.com> wrote:
> Hi everyone,
>
> I get an error when executing the simple script below:
>
> ------------------------------------------------------------------------------
> from yt.mods import * output = 'DD0010/data0010' pf = load(output) region =
> pf.h.region([0.5,0.5,0.5],[0.0,0.0,0.0],[1.0,1.0,1.0])
> ------------------------------------------------------------------------------
> I have pasted the output there:
> http://paste.yt-project.org/show/awqlzVK7mAhtiIVihFfC/
> I think the problem is that my simulation has only 2 particles (no gas) and
> both particles are in subgrids so the root grid is empty:
>
> ------------------------------------------------------------------------------
> [19:46:54] Obiwan:$ h5ls DD0010/data0010.cpu0000 Grid00000001
> Group Grid00000002             Group Metadata                 Group
> [19:47:09] Obiwan:$ h5ls DD0010/data0010.cpu0000/Grid00000001 [19:47:15]
> Obiwan:$ h5ls DD0010/data0010.cpu0000/Grid00000002 particle_index
> Dataset {2} particle_mass            Dataset {2} particle_position_x
> Dataset {2} particle_position_y      Dataset {2} particle_position_z
> Dataset {2} particle_type            Dataset {2} particle_velocity_x
> Dataset {2} particle_velocity_y      Dataset {2} particle_velocity_z
> Dataset {2}
> ------------------------------------------------------------------------------
> I would really appreciate if someone could help me to fix this.
> Thanks a lot,
>
> JC
>
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