Crash when closing the GUI with the red cross

[HeloiseS]

System = Ubuntu.16.04
Environment = Virtual conda python2.7 environment

Error message

Traceback (most recent call last):
  File "/home/heloise/Data/specreduce_tests/specidentify/specreduce/interidentify.py", line 232, in saveWS
    self.ImageSolution[k] = nws
TypeError: 'NoneType' object does not support item assignment
Traceback (most recent call last):
  File "/home/heloise/Data/specreduce_tests/specidentify/specreduce/interidentify.py", line 232, in saveWS
    self.ImageSolution[k] = nws
TypeError: 'NoneType' object does not support item assignment
Traceback (most recent call last):
  File "/home/heloise/Data/specreduce_tests/specidentify/specreduce/interidentify.py", line 232, in saveWS
    self.ImageSolution[k] = nws
TypeError: 'NoneType' object does not support item assignment
Traceback (most recent call last):
  File "/home/heloise/Data/specreduce_tests/specidentify/specreduce/interidentify.py", line 232, in saveWS
    self.ImageSolution[k] = nws
TypeError: 'NoneType' object does not support item assignment
Traceback (most recent call last):
  File "try_specid.py", line 46, in <module>
    subback=0, textcolor='black', log=None, verbose=True)
  File "/home/heloise/Data/specreduce_tests/specidentify/specreduce/interidentify.py", line 1417, in InterIdentify
    imsol = aw.main.ImageSolution.copy()
AttributeError: 'NoneType' object has no attribute 'copy'