Protein-Small molecule docking problem

The HADDOCK category is meant to discuss any HADDOCK-related issue. For general information about HADDOCK refer to


I am docking between protein and small molecule on web server using the easy interface service., for protein, it is OK.

the error read as: You must supply active and/or passive residues for your second protein.

How should I supply ‘active and/or passive residues’ for small molecule?

Define the ligand residue number as active.

Also visit our tutorial about protein-ligand docking, especially the second stage of it: