I want to fix (freeze) ligand during fastrelax because the fastrelax changes ligand conformation weirdly .
This happens even with params file of the ligand.
Therefore, I tried ignore_unrecognized_res, but this option just not outputting the ligand in the result file.
Here I attach screenshots.
By default, FastRelax performs relaxation on all bonds, including ligands. You can use a movemap to specify bond angles that should NOT be moved.
See movemap info here: https://www.rosettacommons.org/docs/latest/application_documentation/structure_prediction/relax
and here: https://www.rosettacommons.org/docs/latest/rosetta_basics/file_types/movemap-file