Dear all,

I am using AutoDock Vina to obtain the binding free energy of a ligand and a crystal surface.  Using ADFR suites to convert input file from  pdb to pdbq, I use

prepare_receptor -r step_x.pdb -o step_x.pdbqt

I encounter this error "ValueError: Could not find atomic number for Ha Ha"

Help me fix this

thanks,

Hari