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

[Matthew Turk]

Off-list JC sent me his data, and I was able to track it down to an
off-by-one error for field detection in Enzo.  Should be fixed now!

On Mon, Mar 26, 2012 at 5:28 AM, Matthew Turk <matthewturk at gmail.com> wrote:
> 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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