Scalar_XZ propagation possible bugs

Hello, when trying to simulate blazed grating I have noticed strange behavior that could be caused by wrong usage of the module or that could be actual bugs in diffractio. In enclosed file is my simulation file where different propagation methods were used. F.BPM() (line 68) and F.WPM() (line 83) work. However: "F.BPM(division=2)" (line 70) crashes "F.PWD()" does not do what I have expected "F.RS()" crashes "F.fast_propagation(mask_xz=F)" is probably called improperly.

Could you please verify this behavior? Thanks, popelek@jcmf.cz