bad histogram datafile prevents entire output from generating

[bloer]

2020-11-06 16:50:45,353 - bgexplorer - ERROR - Exception on /explore/CUTER14_BL/HEAD/getspectrum/PD2 multiples [GET]
Traceback (most recent call last):
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/app.py", line 2447, in wsgi_app
response = self.full_dispatch_request()
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/app.py", line 1952, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/app.py", line 1821, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/_compat.py", line 39, in reraise
raise value
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/app.py", line 1950, in full_dispatch_request
rv = self.dispatch_request()
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/flask/app.py", line 1936, in dispatch_request
return self.view_functionsrule.endpoint
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/bgexplorer/modelviewer/modelviewer.py", line 343, in getspectrum
spectrum = self.simsdb.evaluate([speceval], matches)[0]
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/bgmodelbuilder/simulationsdb/mongosimsdb.py", line 139, in evaluate
val = v.norm(v.parse(doc, match), match)
File "/srv/bgexplorer/instances/bgexplorer-cute/app.py", line 159, in parse
hc = self.hits.parse(doc, match) / self.hits.scale
File "/srv/bgexplorer/instances/bgexplorer-cute/virtenv/lib64/python3.6/site-packages/bgmodelbuilder/simulationsdb/simdoceval.py", line 271, in parse
hist = np.zeros_like(bin_edges[:-1])
TypeError: 'NoneType' object is not subscriptable

[bloer]

fixed in 0.5.3