Dear Modeller Team, I am currently looking for a quick method for calculating the energy of protein structures. I understand that Modeller utilizes a simplified version of the CHARMM force field, which suits my needs, as I’m looking for a fast and approximate energy calculation. I would like to print out each energy term, but with the current code I’m using, the Lennard-Jones and Coulomb terms are returning zero. Could you please advise on how to resolve this issue? The code that I used: from modeller import * from modeller.scripts import complete_pdb # Initialize MODELLER environment (use Environ instead of environ) env = Environ() # Load topology and parameter libraries env.libs.topology.read(file='$(LIB)/top_heav.lib') # Heavy atom topology env.libs.parameters.read(file='$(LIB)/par.lib') # Parameter library # Read in the protein structure mdl = complete_pdb(env, '3VXU.pdb') # Calculate energy mdl.energy() # Energy calculations are complete print("\nEnergy calculation completed.") --- Thank you for your help. Best, Li