Hi all, I am trying to compute specific angular momentum using YT. I am getting the following error. It is already in derived fields list but does not work. Am i doing some thing wrong here? Any ideas what is going wrong here? Thanks in advance! Cheers Latif pc.add_profile_sphere(150, "kpc", ["Radiuspc", "SpecificAngularMomentum"], weight="CellMassMsun", accumulation=False, x_bins=64, x_log=True, x_bounds=None,lazy_reader=True, id=None, figure=None, axes=None) # x, y, weight id=None, figure=None, axes=None) # x, y, weight File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/visualization/plot_collection.py", line 1033, in add_profile_sphere figure=figure, axes=axes) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/visualization/plot_collection.py", line 943, in add_profile_object profile.add_fields(fields[1], weight=weight, accumulation=accumulation) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line 147, in add_fields self._lazy_add_fields(fields, weight, accumulation) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line 107, in _lazy_add_fields args=args, check_cut=True) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line 56, in save_state tr = func(*args, **kwargs) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line 243, in _bin_field source_data = self._get_field(source, field, check_cut) File "/home/astro73/mlatif/YT/yt-x86_64/src/yt-hg/yt/data_objects/profiles.py", line 183, in _get_field data.append(source[field][pointI].ravel().astype('float64')) IndexError: index (3) out of range (0<=index<2) in dimension 0