Hi, I am trying to use iotbx.pdb_remediator to convert PDB atom names to 3.2 format (as suggested by Nat Echols in a recent post to Coot mail-list). Unfortunately I get the following error message: lp212-mp2281 58% iotbx.pdb_remediator file_name=refine.pdb output_file=refine_3.2.pdb_file Traceback (most recent call last): File "/usr/local/cctbx/cctbx_sources/iotbx/command_line/pdb_remediator.py", line 54, in <module> run(sys.argv[1:]) File "/usr/local/cctbx/cctbx_sources/iotbx/command_line/pdb_remediator.py", line 51, in run remediator.remediator(params) File "/usr/local/cctbx/cctbx_sources/iotbx/pdb/remediation/remediator.py", line 257, in remediator user_dict) File "/usr/local/cctbx/cctbx_sources/iotbx/pdb/remediation/remediator.py", line 95, in build_hash test=os.path.isfile), "rb") TypeError: coercing to Unicode: need string or buffer, NoneType found It looks like a python problem, but I am afraid my insight ends here. Can anyone tell me how to fix this, please? I am not sure if it matters, but iotbx_pdb_remediator was not in my phenix installation (PHENIX-1.7.1-743 on MacOSX 10.6.8), so I installed cctbx separately. Thanks! Luca Luca Pellegrini Department of Biochemistry University of Cambridge 80 Tennis Court Road Cambridge CB2 1GA - UK Email: [email protected] Tel: 0044-1223-760469 Fax: 0044-1223-766002 Sanger building, room 3.59