Hi all, I'm running into an issue with translation dictionaries for the GDF frontend. On the tip, if I load up a gdf dataset, and do: pf.h.find_max('Density') I get: http://paste.yt-project.org/show/2008/ If I instead do pf.h.find_max('density'), I get what looks like the same error. If I replace line 56 in yt/frontends/gdf/fields.py 55 KnownGDFFields = FieldInfoContainer() 56 add_gdf_field = KnownGDFFields.add_field with 57 add_gdf_field = GDFFieldInfo.add_field It works fine. Alternatively, if I replace 96 for f,v in log_translation_dict.items(): 97 add_field(f, function=TranslationFunc(v), take_log=True) 98 99 for f,v in translation_dict.items(): 100 add_field(f, function=TranslationFunc(v), take_log=False) with 102 def _generate_translation(mine, theirs, take_log=False): 103 add_field(theirs, function=lambda a, b: b[mine], take_log=take_log) 104 105 106 for f,v in log_translation_dict.items(): 107 if v not in GDFFieldInfo: 108 add_field(v, function=lambda a,b: None, take_log=True, 109 validators = [ValidateDataField(v)]) 110 #print "Setting up translator from %s to %s" % (v, f) 111 _generate_translation(v, f, take_log=True) 112 113 114 for f,v in translation_dict.items(): 115 if v not in GDFFieldInfo: 116 add_field(v, function=lambda a,b: None, take_log=False, 117 validators = [ValidateDataField(v)]) 118 #print "Setting up translator from %s to %s" % (v, f) 119 _generate_translation(v, f, take_log=False) as is done in the orion reader, it works fine. Anyways, if someone sees what is going on here, let me know. I'll also be on IRC for a bit longer tonight and all tomorrow. Thanks, Sam