findMissingAtoms raises AttributeError if findMissingResidues has not been called first

[nielskm]

The following code raises AttributeError: 'PDBFixer' object has no attribute 'missingResidues':

from pdbfixer import PDBFixer
fixer = PDBFixer("6dyo.pdb")
fixer.findMissingAtoms()

Using the PDB from https://www.rcsb.org/structure/6DYO

[peastman]

See the instructions in the manual. Methods must be called in exactly the order shown. Before you can call findMissingAtoms(), you first have to either call findMissingResidues() or else set the missingResidues field yourself.