https://github.com/JoeMcEwen/FAST-PT/blob/cf22622c9f80939871df6468e9dda048292aa6a8/fastpt/J_k.py#L175 should change `!=0` to `!=None`. @jablazek
FAST-PT/fastpt/J_k.py
Line 175 in cf22622
should change
!=0to!=None.@jablazek