Hi phenixers, I just installed the version phenix-1.7-650 on ubuntu 9.4 and tried a test run. My previous version runs fine. The new version gives me this error =============================== refinement start ============================== Traceback (most recent call last): File "/usr/local/phenix-1.7-650/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-1.7-650/phenix/phenix/refinement/command_line.py", line 89, in run call_back_handler=call_back_handler) File "/usr/local/phenix-1.7-650/phenix/phenix/refinement/driver.py", line 1207, in run call_back_handler = call_back_handler) File "/usr/local/phenix-1.7-650/phenix/phenix/refinement/strategies.py", line 220, in refinement_machine xray_structure = model.xray_structure,) File "/usr/local/phenix-1.7-650/phenix/phenix/refinement/strategies.py", line 124, in extract_from_pdb_header xray_structure = xray_structure) File "/usr/local/phenix-1.7-650/cctbx_project/mmtbx/f_model.py", line 327, in __init__ twin_law_xyz = sgtbx.rt_mx(symbol=self.twin_law, r_den=12, t_den=144) RuntimeError: cctbx Error: Parse error: unexpected character: NULL ^ Please, take a look at the error and advise me how to fix it. Maia