[PyMOL] APBS TOOLS 2.1 does not work

[sunyeping <sun...@al...>]

Dear all, 

I am trying to use APBS TOOLs 2.1 to calculate electrostatic potential of proteins. After I finish "set grid", I press the "set grid" button, I get the following error,

(<type 'exceptions.ImportError'>, ImportError('No module named pdb2pqr',), <traceback object at 0x7fed3cf46c68>)
In show error 2

Could you tell what is the cause of the error and how to fix it?

Best regards.