Error when using just 1 fracture family

[rtwilliamsgeo]

When attempting to define a mesh with a single fracture family, the software fails with the following error:

Traceback (most recent call last):
File "run.py", line 17, in
DFN.dfn_gen(output=False)
File "/usr/local/lib/python3.6/dist-packages/pydfnworks-2.2-py3.6.egg/pydfnworks/dfnGen/generator.py", line 43, in dfn_gen
self.check_input()
File "/usr/local/lib/python3.6/dist-packages/pydfnworks-2.2-py3.6.egg/pydfnworks/dfnGen/gen_input.py", line 1320, in check_input
verify_params()
File "/usr/local/lib/python3.6/dist-packages/pydfnworks-2.2-py3.6.egg/pydfnworks/dfnGen/gen_input.py", line 1236, in verify_params
paramFunc('r')
File "/usr/local/lib/python3.6/dist-packages/pydfnworks-2.2-py3.6.egg/pydfnworks/dfnGen/distributions.py", line 48, in beta_distribution
desiredLength=numFamilies)
File "/usr/local/lib/python3.6/dist-packages/pydfnworks-2.2-py3.6.egg/pydfnworks/dfnGen/gen_input.py", line 360, in verify_list
"list".format(key, listType, examples[listType], listType))
NameError: name 'examples' is not defined

When switching to 2 fracture families, the procedure runs correctly.