We've seen this before - it seems to happen only with certain structures. When I tried debugging this for someone else, I found that the newer code didn't crash like this (but I could reproduce it in 1.7.1). Could you please try updating to a recent nightly build and see if that fixes the problem? -Nat On Fri, Jun 24, 2011 at 1:07 AM, Ngan Nguyen Bich wrote:

Dear all, I've got a problem when rerunning the same job of my project in the new laptop. I've found that it's because of the NCS restraint groups set-up In the old computer I set two NCS restraints groups as: First group: Reference group: chain A and sidechain and resid 3:216 and not (resid 63 or resid 66 or resid 81 or resid 93 or resid 133 or resid 135 or resid 181 or resid 184 or resid 193 or resid 194 or resid 212) Second group: Reference group: chain A and backbone and resid 3:217 and not (resid 63 or resid 133 or resid 135 or resid 184) And the refine_phenix run well in the old computer, but the new laptop with the error in the end of this letter. I've found that if I delete the backbone in the second group, it runs again. So I wonder that how I could refine NCS restraint of backbone now? Thank you in advance. Ngan RuntimeError : mean() argument is an empty array Traceback:   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/libtbx/thread_utils.py", line 223, in run     return_value = self._target(self._args, self._kwargs, self._c)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/libtbx/runtime_utils.py", line 58, in __call__     result = self.target()   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/phenix/phenix/refinement/runtime.py", line 68, in __call__     call_back_handler=callback)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/phenix/phenix/refinement/command_line.py", line 89, in run     call_back_handler=call_back_handler)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/phenix/phenix/refinement/driver.py", line 1278, in run     reference_model_manager = self.reference_model_manager)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/phenix/phenix/refinement/strategies.py", line 322, in refinement_machine     monitors.collect(step = "0    :", model = model, fmodels = fmodels)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/refinement/__init__.py", line 51, in collect     rigid_body_shift_accumulator = rigid_body_shift_accumulator)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/refinement/print_statistics.py", line 263, in collect     ignore_side_chain = True,   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/model.py", line 971, in geometry_statistics     restraints_manager = self.restraints_manager)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/model_statistics.py", line 38, in __init__     compute_gradients = True)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/restraints.py", line 66, in energies_sites     normalization=False)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/ncs/restraints.py", line 686, in energies_sites     self.compute_operators(sites_cart=sites_cart)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/ncs/restraints.py", line 679, in compute_operators     self.operators.append(group.operators(sites_cart=sites_cart))   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/ncs/restraints.py", line 336, in operators     return _operators(group=self, sites_cart=sites_cart)   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/mmtbx/ncs/restraints.py", line 442, in __init__     other_sites=sites_cart.select(pair[1]))   File "/Applications/PHENIX-1.7.1-743/Contents/phenix-1.7.1-743/cctbx_project/scitbx/math/superpose.py", line 58, in __init__     self.reference_shift = reference_sites.mean()

Platform info: __FILE__ = /net/patchnose/scratch1/phenix/phenix-1.7.1-743/cctbx_project/boost_adaptbx/meta_ext.cpp __DATE__ = Apr 28 2011 __TIME__ = 02:15:10 __i386__ __APPLE_CC__ = 5367 __GNUC__ = 4 __GNUC_MINOR__ = 0 __GNUC_PATCHLEVEL__ = 1 boost::python::cxxabi_cxa_demangle_is_broken(): false __GXX_WEAK__ = 1 __VERSION__ = 4.0.1 (Apple Computer, Inc. build 5367) FE_INEXACT = 32 FE_DIVBYZERO = 4 FE_UNDERFLOW = 16 FE_OVERFLOW = 8 FE_INVALID = 1 FE_ALL_EXCEPT = 61 __SSE2__ = 1 BOOST_LIB_VERSION = 1_47 PY_VERSION = 2.7.1 PYTHON_API_VERSION = 1013 sizeof(bool) = 1 sizeof(short) = 2 sizeof(int) = 4 sizeof(long) = 4 sizeof(std::size_t) = 4 sizeof(void*) = 4 sizeof(long long) = 8 sizeof(float) = 4 sizeof(double) = 8 sizeof(long double) = 16 sizeof(boost::int32_t) = 4 sizeof(boost::uint32_t) = 4 sizeof(wchar_t) = 4 __PTRDIFF_TYPE__ Py_USING_UNICODE sizeof(PY_UNICODE_TYPE) = 2 BOOST_ADAPTBX_TYPE_ID_SIZE_T_EQ_UNSIGNED_LONG os.name: posix sys.platform: darwin sys.byteorder: little platform.platform(): Darwin-10.7.4-x86_64-i386-32bit platform.architecture(): ('32bit', '') floating_point_exceptions.division_by_zero_trapped: False floating_point_exceptions.invalid_trapped: False floating_point_exceptions.overflow_trapped: False number of processors: 4 Memory total:  4,294,967,296 Memory free:         unknown import thread: OK "hello" = ['h', 'e', 'l', 'l', 'o'] u"hello" = ['h', '\x00', 'e', '\x00', 'l', '\x00', 'l', '\x00', 'o', '\x00'] u"\u00C5" = ['\xc5', '\x00'] as utf-8 = ['\xc3', '\x85'] LATIN CAPITAL LETTER A WITH RING ABOVE = √Ö

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