aesteves@fcien.edu.uy wrote: > I think I have found the problem but I don´t know how to solve it. > The residue in question is an HETATM; I mean that where the sequence > indicates a SER the pdb file has an HETATM (CSO). How can I solve it? > Simply, it means that your alignment does not match your PDB. Obviously they have to match exactly, otherwise Modeller will not know how to generate its restraints. If you can't figure it out, you should post the PDB code and your alignment, as it's hard to say anything more without seeing these.

Ben Webb, Modeller Caretaker