H5 file problem

Hello,

After working with my own images(some images), i created << ucm.mat >> with no problem and the segmentation worked fine and i've got the << seg_uint16.h5 >> file.
Running the << visualize_result.py >> gave me this error :
`mansour@mansourpc:~/hala/SynthText-master$ python ./visualize_results.py
Traceback (most recent call last):
File "./visualize_results.py", line 74, in
main('results/SynthText.h5')
File "./visualize_results.py", line 55, in main
dsets = sorted(db['data'].keys())
File "/usr/lib/python2.7/dist-packages/h5py/_hl/group.py", line 153, in __getitem__
oid = h5o.open(self.id, self._e(name), lapl=self._lapl)
File "h5o.pyx", line 173, in h5py.h5o.open (h5py/h5o.c:3403)
KeyError: "unable to open object (Symbol table: Can't open object)"`

Is the problem with the h5 file ??
Thank you for any advice you give me.