Hi all Traceback (most recent call last): File "/usr/local/phenix-1.7.1-743/phenix/phenix/command_line/refine.py", line 11, in <module> command_line.run(command_name="phenix.refine", args=sys.argv[1:]) File "/usr/local/phenix-1.7.1-743/phenix/phenix/refinement/command_line.py", line 67, in run overwrite = command_line_interpreter.command_line.options.overwrite) File "/usr/local/phenix-1.7.1-743/phenix/phenix/refinement/driver.py", line 112, in __init__ hbond_params=self.params.hydrogen_bonding) File "/usr/local/phenix-1.7.1-743/cctbx_project/mmtbx/secondary_structure/__init__.py", line 494, in create_hbond_proxies log=log) File "/usr/local/phenix-1.7.1-743/cctbx_project/mmtbx/secondary_structure/__init__.py", line 286, in hydrogen_bond_proxies_from_selections log=log) File "/usr/local/phenix-1.7.1-743/cctbx_project/mmtbx/secondary_structure/base_pairing.py", line 415, in create_hbond_proxies if distance_values[i][2] != '_': IndexError: tuple index out of range When specifying a single base pair when using secondary_structure nucleic acids restraints Any ideas? Thanks! F --------------------------------------------- Francis E. Reyes M.Sc. 215 UCB University of Colorado at Boulder