Hi, I ran cookbook_hop_mass_sum.py and it gives me this error... Traceback (most recent call last): File "cookbook_hop_mass_sum.py", line 19, in <module> sphere = halo.get_sphere() File "/autohome/u118/agarwa23/enzo1/src/yt/yt/lagos/HaloFinding.py", line 128, in get_sphere center, radius=radius) File "/autohome/u118/agarwa23/enzo1/src/yt/yt/lagos/BaseDataTypes.py", line 1800, in __init__ raise SyntaxError("Your radius is smaller than your finest cell!") SyntaxError: Your radius is smaller than your finest cell! How does it matter if halo radius is smaller than finest cell ? cookbook_hop_mass_sum.py should just spit the baryon mass, dark matter mass and total mass. # Group Mass # part max densx y z center-of-mass x y z vx vy vz max_r 0 1.009603589e+15 3202 6.803410660e+03 2.691574395e-01 1.892197430e-01 8.293117285e-01 2.701045173e-01 1.889703433e-01 8.276973165e-01 -6.232934392e+06 -2.872425257e+07 1.526929994e+06 1.886896417e-02 shankar