IndexError: index 0 is out of bounds for axis 0 with sieze o

[zhouliqing0516]

hi, when i want to run the basic_example, i get the this errors. it seems like raw_points cant get the corrdinates. i dont know how to address this problem. help me.
Traceback (most recent call last):
File "/home/jingtaozhou/POVME/POVME/POVME3.py", line 2207, in
if name == "main": dorun = runit(sys.argv)
^^^^^^^^^^^^^^^
File "/home/jingtaozhou/POVME/POVME/POVME3.py", line 1958, in init
convexHull, crossProducts = determineFirstConvexHull(index_and_pdbs,parameters)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jingtaozhou/POVME/POVME/POVME3.py", line 858, in determineFirstConvexHull
hull = convex_hull_3d.gift_wrapping_3d(akl_toussaint_pts) # calculate convex hull using gift wrapping algorithm
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/jingtaozhou/POVME/POVME/POVME3.py", line 321, in gift_wrapping_3d
point1 = raw_points[0] # take the first point
~~~~~~~~~~^^^
IndexError: index 0 is out of bounds for axis 0 with size 0