Hi,

That's a lot of particles/octs.  Is there any chance you've run out of memory?   

-desika


On Mon, Jul 30, 2018 at 4:14 AM <qinyuxian@163.com> wrote:
I tried to use yt to analyse Illustris-1 data. However, yt can not load the data.
When I use the command
ds = yt.load("/scratch/Illustris/Illustris-1/snapdir_135/snap_135.0.hdf5")
I get this response
yt : [INFO     ] 2018-06-24 18:03:58,721 Calculating time from 1.000e+00 to be 4.340e+17 seconds
yt : [INFO     ] 2018-06-24 18:03:58,721 Assuming length units are in kpc/h (comoving)
yt : [INFO     ] 2018-06-24 18:03:58,803 Parameters: current_time              = 4.3395518355981376e+17 s
yt : [INFO     ] 2018-06-24 18:03:58,803 Parameters: domain_dimensions         = [2 2 2]
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: domain_left_edge          = [0. 0. 0.]
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: domain_right_edge         = [75000. 75000. 75000.]
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: cosmological_simulation   = 1
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: current_redshift          = 2.220446049250313e-16
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: omega_lambda              = 0.7274
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: omega_matter              = 0.2726
yt : [INFO     ] 2018-06-24 18:03:58,804 Parameters: hubble_constant           = 0.704
yt : [INFO     ] 2018-06-24 18:03:59,093 Allocating for 1.793e+10 particles (index particle type 'all')
yt : [INFO     ] 2018-06-24 19:53:51,036 Identified 7.700e+08 octs
/var/spool/pbs/mom_priv/jobs/306683.venus.SC: line 8: 185742 Segmentation fault      (core dumped)

What's wrong with yt?
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