In my refinement phenix.refine crashed with the following errors.

================================ xyz refinement ===============================

Traceback (most recent call last):

  File "/nfs/home/jzhu/cci_apps_sources/phenix/phenix/command_line/refine.py", line 5, in <module>

    command_line.run(command_name="phenix.refine", args=sys.argv[1:])

  File "/nfs/home/jzhu/cci_apps_sources/phenix/phenix/refinement/command_line.py", line 78, in run

    call_back_after_monitor_collect=call_back_after_monitor_collect)

  File "/nfs/home/jzhu/cci_apps_sources/phenix/phenix/refinement/driver.py", line 1310, in run

    log                     = log)

  File "/nfs/home/jzhu/cci_apps_sources/phenix/phenix/refinement/strategies.py", line 733, in refinement_machine

    h_params                 = h_params)

  File "/nfs/home/jzhu/cci_apps_sources/mmtbx/mmtbx/refinement/minimization.py", line 136, in __init__

    ignore_line_search_failed_step_at_lower_bound = True))

  File "/nfs/home/jzhu/cci_apps_sources/scitbx/scitbx/lbfgs.py", line 242, in run

    log)

  File "/nfs/home/jzhu/cci_apps_sources/scitbx/scitbx/lbfgs.py", line 121, in run_c_plus_plus

    f, g = target_evaluator.compute_functional_and_gradients()

  File "/nfs/home/jzhu/cci_apps_sources/mmtbx/mmtbx/refinement/minimization.py", line 369, in compute_functional_and_gradients

    u_iso_refinable_params = u_iso_refinable_params)

  File "/nfs/home/jzhu/cci_apps_sources/mmtbx/mmtbx/refinement/minimization.py", line 224, in compute_target

    sf_v3d_sel = sf_v3d.set_selected(self.hd_selection, [0,0,0])

RuntimeError: scitbx Internal Error: /net/sharptail/scratch1/rwgk/auto_build/sources/scitbx/include/scitbx/array_family/boost_python/flex_wrapper.h(473): SCITBX_ASSERT(a.accessor() == flags.accessor()) failure.

What happened here?  Thanks.

Jianghai