A warning when importing pycrccosy in a python script

Hi,

if I try to run the route_planner in a python script, this warning appears:

UserWarning: You won't be able to use the Curvilinear Coordinate System for the Navigator, 
                      the calculations won't be precise. No module named 'pycrccosy'
  the calculations won't be precise. {exp}""")

However, if I use the jupyter notebook, this warning does not take place.

Could you please give some hints?

Thanks a lot!

BR, Kailin

same as problem here:

The provided route planner does not use the Curvilinear coordinate system (only used internally), you can simply comment out those warnings.