[yt-users] Problems reading GADGET 2 Binary datafile using yt

[Nathan Goldbaum]

We should have support for outputs in the SnapFormat=1 output format in the
latest release of yt. If you're not using the latest version of yt, please
try updating. If it's a multi-file dataset, you should load the 0th file.

If that is not working it would help to debug the issue if you can share an
output file that isn't loading. The easiest way to share an ouput is to use
the yt curldrop:

https://docs.hub.yt/services.html#curldrop

If you're not comfortable sharing the file publicly you can mail me
off-list with the link to the output file.

Hope that helps,

Nathan

On Wed, Feb 22, 2017 at 10:49 AM, Alankar Dutta <dutta.alankar at gmail.com>
wrote:

> Hello YT-community,
>
> This outputs are created with SnapFormat parameter set to 1. This is
> requirement mentioned in the users guideline of yt.
>
> Cheers,
> Alankar
>
> On Wed, Feb 22, 2017 at 10:02 PM, Alankar Dutta <dutta.alankar at gmail.com>
> wrote:
>
>> Hello YT-community,
>>
>> I have been trying to use yt for analysis of the output from a GADGET 2
>> simulation stored as an Unformatted Fortran Binary. It consists of files
>> named as snapshot_068 which is divided into 1024 subfiles named as
>> snapshot_068.0, snapshot_068.1 and so on. Whenever I am loading this with
>> yt I am getting the following error message and I have got no idea as to
>> how to fix this. I have also tried reading only one subfile of this multi
>> part snapshot but with no success. I am relying on the community to help me
>> in this regard.
>>
>> My code:
>>
>> fname = 'snapdir_068/snapshot_068'
>> ds = yt.load(fname)
>>
>> Error displayed:
>>
>> yt : [ERROR    ] 2017-02-22 21:55:34,587 None of the arguments provided
>> to load() is a valid file
>> yt : [ERROR    ] 2017-02-22 21:55:34,587 Please check that you have used
>> a correct path
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "/home/alankar/anaconda3/lib/python3.5/site-packages/yt/convenience.py",
>> line 76, in load
>>     raise YTOutputNotIdentified(args, kwargs)
>> yt.utilities.exceptions.YTOutputNotIdentified: Supplied
>> ('snapshot_068',) {}, but could not load!
>>
>>
>>
>>
>> #Trying to read only one of the multi part file
>> My code:
>>
>> fname = 'snapdir_068/snapshot_068.0'
>> ds = yt.load(fname)
>>
>> Error displayed:
>>
>> yt : [ERROR    ] 2017-02-22 21:57:17,625 Couldn't figure out output type
>> for /media/alankar/Seagate Expansion Drive/mb2/snapshots/snapdir_06
>> 8/snapshot_068.0
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "/home/alankar/anaconda3/lib/python3.5/site-packages/yt/convenience.py",
>> line 98, in load
>>     raise YTOutputNotIdentified(args, kwargs)
>> yt.utilities.exceptions.YTOutputNotIdentified: Supplied
>> ('snapshot_068.0',) {}, but could not load!
>>
>>
>> Cheers,
>> Alankar
>>
>>
>
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