Hi, 

I need to calculate the minimum distance between 2 residues but It seems that I can't find the correct way to use the 'measure distance' command in python script. I tried:

import Measure

temp = Measure.measure_command('distance', 'distance :628.a :20.b')

but it gave me the error: "No target atoms or surface"

Can you please precise the correct syntax of this command?

Thank you!

Thu