Hello,
I have started using phenix.maps to calculate some kicked omit maps and had two questions:

1) is there a way to control parameters such as the initial random seed or number of kick iterations? Different runs with the same params and input files appear to give different map coefficient outputs.

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'

thanks,
Alastair