On Mon, Jul 12, 2010 at 9:20 AM, Alastair Fyfe <afyfe@soe.ucsc.edu> wrote:
2) after what appears to be a successful run on a pdb containing two rna chains and solvent atoms  I (a) removed all non-RNA atoms and (b) moved all RNA atoms to corresponding symmetry locations within the ASU. No other changes were involved but I now receive the following python stack trace:

Compute maps.
Traceback (most recent call last):
 File "/home/afyfe/phenix/phenix-1. 6.1-357/cctbx_project/mmtbx/command_line/maps.py", line 192, in <module>
   run(args=sys.argv[1:])
 File "/home/afyfe/phenix/phenix-1.6.1-357/cctbx_project/mmtbx/command_line/maps.py", line 168, in run
   params = params.maps.map_coefficients)
 File "/home/afyfe/phenix/phenix-1.6.1-357/cctbx_project/mmtbx/maps/__init__.py", line 295, in __init__
   coeffs = map_coefficients_from_fmodel(fmodel = fmodel, params = mcp)
 File "/home/afyfe/phenix/phenix-1.6.1-357/cctbx_project/mmtbx/maps/__init__.py", line 257, in map_coefficients_from_fmodel
   average_maps      = False).map_coeffs
 File "/home/afyfe/phenix/phenix-1.6.1-357/cctbx_project/mmtbx/map_tools.py", line 73, in __init__
   map_helper_obj = fmodel.map_calculation_helper()
AttributeError: 'twin_model_manager' object has no attribute 'map_calculation_helper'

I believe kicked maps are incompatible with twinning - this is a long-standing bug.  The program will automatically apply a twin law if it thinks this will improve the R-factor (I think it needs to be at least 0.02 lower for this to happen); if you don't think this is appropriate, the latest version should have a checkbox to disable the twin law.  But if you really do have twinning, no kick maps.  Sorry!  I will see if I can modify the code to raise a more useful error message instead of just crashing.

-Nat