New issue 541: Docs for Ghost Zone Requiring Covering Grids https://bitbucket.org/yt_analysis/yt/issue/541/docs-for-ghost-zone-requiring... Sam Skillman: We should make it clear how to get a covering grid for fields that require ghost zones. This is primarily a docs issue, but the By running the cookbook ``extract_fixed_resolution_data.py`` with DivV instead leads to this error: ``` #!python skillman/test_data:python extract_fixed_resolution_data.py Traceback (most recent call last): File "extract_fixed_resolution_data.py", line 19, in <module> num_ghost_zones=0) File "/home/skillman/local/src/yt-hg/yt/data_objects/data_containers.py", line 3735, in __init__ self._refresh_data() File "/home/skillman/local/src/yt-hg/yt/data_objects/data_containers.py", line 3752, in _refresh_data AMR3DData._refresh_data(self) File "/home/skillman/local/src/yt-hg/yt/data_objects/data_containers.py", line 320, in _refresh_data self.get_data() File "/home/skillman/local/src/yt-hg/yt/data_objects/data_containers.py", line 3770, in get_data self._generate_field(field) File "/home/skillman/local/src/yt-hg/yt/data_objects/data_containers.py", line 3801, in _generate_field self.pf.field_info[field].check_available(self) File "/home/skillman/local/src/yt-hg/yt/data_objects/field_info_container.py", line 364, in check_available validator(data) File "/home/skillman/local/src/yt-hg/yt/data_objects/field_info_container.py", line 494, in __call__ raise NeedsGridType(self.ghost_zones,self.fields) yt.data_objects.field_info_container.NeedsGridType: (1, ['x-velocity', 'y-velocity', 'z-velocity']) ``` We should catch this and report back to the user to require the correct number of ghost zones Responsible: samskillman -- This is an issue notification from bitbucket.org. You are receiving this either because you are the owner of the issue, or you are following the issue.