Hi everyone,<div><br></div><div>I need to input a parameter file describing the bond lengths of a metal chelator complex in my protein. I used a text file containing the commands with .params extension. when I add this file in GUI inputs in refinement, it gives a message &quot;Phenix did not recognize the file type&quot;.  What is the file type I should use?</div>
<div><br></div><div>The file contained commands similar to the following with my metal and ligand atom names.</div><div><br></div><div><pre class="literal-block" style="text-align:-webkit-left">refinement.geometry_restraints.edits {
  zn_selection = chain X and resname ZN and resid 200 and name ZN
  his117_selection = chain X and resname HIS and resid 117 and name NE2
  asp130_selection = chain X and resname ASP and resid 130 and name OD1
  bond {
    action = *add
    atom_selection_1 = $zn_selection
    atom_selection_2 = $his117_selection
    symmetry_operation = None
    distance_ideal = 2.1
    sigma = 0.02
    slack = None
  }
  bond {
    action = *add
    atom_selection_1 = $zn_selection
    atom_selection_2 = $asp130_selection
    symmetry_operation = None
    distance_ideal = 2.1
    sigma = 0.02
    slack = None
  }
 
}
</pre></div><div><br></div><div>Then I used command line to run &quot;<span style="text-align:-webkit-left">phenix.refine model.pdb data.mtz elbow.cif restraints_edits.params&quot; it again gave error saying .params is an unknown file type.</span></div>
<div><span style="text-align:-webkit-left"><br></span></div><div style="text-align:-webkit-left">Am I doing anything wrong and is there any other way to fix the distances of the metal chelator complex.</div><div style="text-align:-webkit-left">
<br></div><div style="text-align:-webkit-left"><br></div><div style="text-align:-webkit-left">Thanks</div><div style="text-align:-webkit-left">Subhani</div>