Hi, I am trying to create SUNRISE files for a RAMSES snapshot. I am using the latest stable version of YT ("2.1stable"). I can read the RAMSES snapshot, but the sunrise_exporter routine fails. The reason, it seems, is that it wants to access a field "InitialTime" that actually does not exist (see below). Is there somewhere some additional information about how to convert RAMSES to SUNRISE using YT? I could not find much (that includes searching the mailing lists). Thanks Robert

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pf = load("output_00105/info_00105.txt") output_00105/amr_00105.out00001 yt : [INFO ] 2011-08-21 00:09:47,343 Parameters: current_time = -1.23236270587e+17 yt : [INFO ] 2011-08-21 00:09:47,343 Parameters: domain_dimensions = [2 2 2] yt : [INFO ] 2011-08-21 00:09:47,344 Parameters: domain_left_edge = [ 0. 0. 0.] yt : [INFO ] 2011-08-21 00:09:47,344 Parameters: domain_right_edge = [ 1. 1. 1.] yt : [INFO ] 2011-08-21 00:09:47,344 Parameters: cosmological_simulation = 1 yt : [INFO ] 2011-08-21 00:09:47,345 Parameters: current_redshift = 1.00027409463 yt : [INFO ] 2011-08-21 00:09:47,345 Parameters: omega_lambda = 0.759999990463 yt : [INFO ] 2011-08-21 00:09:47,345 Parameters: omega_matter = 0.239999994636 yt : [INFO ] 2011-08-21 00:09:47,345 Parameters: hubble_constant = 73.0

Now, when I try the following I get an error

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from yt.analysis_modules.sunrise_export import sunrise_exporter sunrise_exporter.export_to_sunrise(pf,"analysis/yt/HYDRO_L2_18_GF_epsstar0d1") yt : [INFO ] 2011-08-21 00:11:30,744 Re-gridding level 0: 1 octree grids Re-gridding 100% ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Time: 00:00:00 ... Re-gridding 100% ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Time: 00:00:0 yt : [INFO ] 2011-08-21 00:11:46,711 Final grid count: 302 yt : [INFO ] 2011-08-21 00:11:46,775 Re-gridding level 16: 59069 octree grids Re-gridding 100% ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Time: 00:00:0 yt : [INFO ] 2011-08-21 00:11:47,093 Final grid count: 153 yt : [INFO ] 2011-08-21 00:11:52,568 Getting field particle_type from 2894 yt : [INFO ] 2011-08-21 00:11:52,760 Getting field particle_position_x from 2894 yt : [INFO ] 2011-08-21 00:11:52,951 Getting field particle_position_y from 2894 yt : [INFO ] 2011-08-21 00:11:53,141 Getting field particle_position_z from 2894 yt : [INFO ] 2011-08-21 00:11:53,344 Getting field particle_velocity_x from 2894 yt : [INFO ] 2011-08-21 00:11:53,542 Getting field particle_velocity_y from 2894 yt : [INFO ] 2011-08-21 00:11:53,739 Getting field particle_velocity_z from 2894

KeyError Traceback (most recent call last) /d/scratch39/feldmann/local/yt/yt-x86_64/src/yt-hg/scripts/iyt in <module>() ----> 1 2 3 4 5 /d/scratch39/feldmann/local/yt/yt-x86_64/src/yt-hg/yt/analysis_modules/sunrise_export/sunrise_exporter.pyc in export_to_sunrise(pf, fn, write_particles, sub gion_bounds, particle_mass, particle_pos, particle_age, particle_metal) 110 # Velocity is cm/s, we want it to be kpc/yr 111 vel *= (pf["kpc"]/pf["cm"]) / (365*24*3400.) --> 112 age = pf["years"] * (pf["InitialTime"] - reg["creation_time"][pi]) 113 creation_time = reg["creation_time"][pi] * pf["years"] 114 /d/scratch39/feldmann/local/yt/yt-x86_64/src/yt-hg/yt/data_objects/static_output.pyc in __getitem__(self, key) 117 self.conversion_factors]: 118 if key in d: return d[key] --> 119 raise KeyError(key) 120 121 def keys(self): KeyError: 'InitialTime' --- These are the available fields in pf pf._StaticOutput__hierarchy pf.__repr__ pf._setup_nounits_units pf.has_key pf.__class__ pf.__setattr__ pf.basename pf.hierarchy pf.__delattr__ pf.__sizeof__ pf.conversion_factors pf.hubble_constant pf.__dict__ pf.__str__ pf.cosmological_simulation pf.keys pf.__doc__ pf.__subclasshook__ pf.current_redshift pf.omega_lambda pf.__format__ pf.__weakref__ pf.current_time pf.omega_matter pf.__getattribute__ pf._fieldinfo_class pf.data_style pf.parameter_filename pf.__getitem__ pf._get_hierarchy pf.dimensionality pf.parameters pf.__hash__ pf._handle pf.directory pf.print_key_parameters pf.__init__ pf._hash pf.domain_dimensions pf.ramses_tree pf.__iter__ pf._hierarchy_class pf.domain_left_edge pf.refine_by pf.__metaclass__ pf._instantiated pf.domain_right_edge pf.storage_filename pf.__module__ pf._is_valid pf.field_info pf.time_units pf.__new__ pf._parse_parameter_file pf.fullpath pf.unique_identifier pf.__reduce__ pf._set_hierarchy pf.get_smallest_appropriate_unit pf.units pf.__reduce_ex__ pf._set_units pf.h