Hi all, I will highly appreciate your help to resolve the following bugs encountered during running phenix.refine on GUI as well as on command lines. My version of Phenix and platform are: PHENIX: Python-based Hierarchical ENvironment for Integrated Xtallography Version: 1.4 Release tag: 3 cctbx tag: 2008_12_07_1353 Platform: mac-intel-osx osx-10.5.8 The error encountered using phenix refinement GUI (phenix.refine_gui) is as follows: A Python error was detected. This is almost certainly a bug; please send an email containing this message to [email protected] so we can fix it. Thanks!RuntimeError : min() argument is an empty arrayTraceback:Traceback (most recent call last): File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Base.py", line 274, in OnBrowse self.file_text_field.SetValue(new_path) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Controls.py", line 974, in SetValue self.phil_handler.propagate_update(self.phil_def_name, new_value) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/PhilInterfaceHandler.py", line 103, in propagate_update self._update_handlers[def_name](self, def_name, value) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Extensions.py", line 28, in extract_xray_neutron_params phil_def_name = phil_object_name) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Reflections.py", line 155, in __init__ self.load_reflection_file(file_name, phil_def_name) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Reflections.py", line 159, in load_reflection_file self.hkl_server = self.hkl_handler.add_hkl_file(file_name, phil_def_name) File "/usr/local/phenix-1.4-3/phenix/wxGUI2/Reflections.py", line 66, in add_hkl_file err=sys.stderr) File "/usr/local/phenix-1.4-3/iotbx/reflection_file_utils.py", line 393, in __init__ force_symmetry=self.force_symmetry)) File "/usr/local/phenix-1.4-3/iotbx/reflection_file_reader.py", line 197, in as_miller_arrays base_array_info=base_array_info) File "/usr/local/phenix-1.4-3/iotbx/mtz/__init__.py", line 434, in as_miller_arrays and flex.min(column_group.sigmas()) > 0): The error encountered using phenix refinement on command line (phenix.refine coordinate.pdb reflection.mtz) is as follows: Traceback (most recent call last): File "/usr/local/phenix-1.4-3/phenix/phenix/command_line/refine.py", line 9, in <module> command_line.run(command_name="phenix.refine", args=sys.argv[1:]) File "/usr/local/phenix-1.4-3/phenix/phenix/refinement/command_line.py", line 68, in run log=log) File "/usr/local/phenix-1.4-3/phenix/phenix/refinement/command_line.py", line 231, in __init__ reflection_file_server = self.reflection_file_server() File "/usr/local/phenix-1.4-3/phenix/phenix/refinement/command_line.py", line 566, in reflection_file_server err=self.log) File "/usr/local/phenix-1.4-3/iotbx/reflection_file_utils.py", line 393, in __init__ force_symmetry=self.force_symmetry)) File "/usr/local/phenix-1.4-3/iotbx/reflection_file_reader.py", line 197, in as_miller_arrays base_array_info=base_array_info) File "/usr/local/phenix-1.4-3/iotbx/mtz/__init__.py", line 434, in as_miller_arrays and flex.min(column_group.sigmas()) > 0):RuntimeError: min() argument is an empty array N.B. Earlier, I had encountered the similar error (using command line) using PHENIX version 1.3 on the same platform. Thanks in advance. Regards, Ravi Ravindra D. Makde, PhD Postdoctoral fellow, Tan lab, The Department of Biochemistry and Molecular Biology, The Pennsylvania State University, University Park, PA 16802 USA