The Molecular Graphics Laboratory Forum

I'm trying to run a docking procedure using a macromolecule that is not a protein (without residue numbering). I read on other forum topic that a solution to run flexible docking on Vina trough PyRx was to make two "special" pdbqt files on ADT: one of your receptor that is missing the residues that will be flexible, and one that contains the flexible residues. However, then I use ADT, Flexible Residues>choose torsion, I get the message "Current Selected Residues have no active torsions". I tried to do this by selecting the entire chain to be flexible, 4 atoms that define a torsion angle, and only 1 atom, but it doe not work either way. Am I doing something wrong? Thank you.