New issue 585: plot collection add_projection not working? https://bitbucket.org/yt_analysis/yt/issue/585/plot-collection-add_projectio... kstewart: When I try to run a very basic projection plot with yt 3.0 I get the following error: pc=PlotCollection(pf, center) pc.add_projection("Density", 'x', "Density") /Users/kstewart/code/yt-3.0/yt-x86_64/src/yt-3.0-hg/yt/visualization/plot_collection.py in add_projection(self, field, axis, weight_field, data_source, center, use_colorbar, figure, axes, fig_size, periodic, obj, field_parameters) 781 obj = self.pf.hierarchy.proj(field, axis, weight_field, 782 source = data_source, center=center, --> 783 **field_parameters) 784 p = self._add_plot(PCProjectionPlot(obj, field, 785 use_colorbar=use_colorbar, axes=axes, figure=figure, TypeError: __init__() got an unexpected keyword argument 'source' Not sure what's going on here. Looks like some kind of bug since this same code works perfectly in 2.5 -Kyle Stewart