Convert OpenSCAD files to STEP or IGES using FreeCAD python library

convert_shape.py

#!/usr/bin/python

# path to FreeCAD.so
FREECADPATH = '/usr/lib64/freecad/lib'
import sys
sys.path.append(FREECADPATH)

if len(sys.argv)<3:
  print "Usage: sys.argv[0] <in_file> <out_file>"
  sys.exit(1)

iname=sys.argv[1]
oname=sys.argv[2]

# support two export formats: step and iges.
# determin format from extension
if oname[-5:]==".iges":
  type="iges"
elif oname[-5:]==".step":
  type="step"
else:
  print "Output file should have .step or .iges extension"
  sys.exit(1)

import FreeCAD
import Part

# Openscad import settings according to
# https://forum.lulzbot.com/viewtopic.php?t=243
p=FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD")
p.SetBool('useViewProviderTree',True)
p.SetBool('useMultmatrixFeature',True)
# For some reason conversion does not work with cylinders created from
# extruded 2d circles.
# So I set MaxFN large enough and use smaller $fn in my step files to
# export such cilinders as polygons.
# If you use only normal cylinders, no need to use so large number here.
p.SetInt('useMaxFN',50)

# This should read any type of file
FreeCAD.loadFile(iname)

# iterate through all objects
for o in App.ActiveDocument.Objects:
  # find root object and export the shape
  if len(o.InList)==0:
    if type=="step":   o.Shape.exportStep(oname)
    elif type=="iges": o.Shape.exportIges(oname)
    sys.exit(0)

print "Error: can't find any object"
sys.exit(1)

Think the problem is setting the max number faces for polygon no longer works via the OpenSCAD preference setting screen.
If one changes it via Tools | Edit Parameters | Mod | OpenSCAD etc it works.

I have another workbench which also suffers from using the preference setting screen.

Need to investigate further.