cannot open lsm file from Zeiss 710 microscope

[Sahar Pirmoradain]

When I try to open lsm file, using:

image_file = lsmreader.Lsmimage(lsmfile)
image_file.open()

I get the following error:

---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
<ipython-input-10-1a7c9aa28243> in <module>()
      1 lsmfile = '/Users/sahar/Documents/Academics/Research/TianLab/ImageAnalysis/20xTS_50Hz_spont.lsm'
      2 image_file = lsmreader.Lsmimage(lsmfile)
----> 3 image_file.open()

/Users/sahar/anaconda2/lib/python2.7/site-packages/pylsm/lsmreader.pyc in open(self)
     93 while im_offset:
     94 tmp_header = lsmparse.read_image_header(__fid, im_offset)
---> 95 if tmp_header['New Subfile Type']:
     96 self.header['Thumbnail'].append(tmp_header)
     97 else:

KeyError: 'New Subfile Type'