Apparently the Shapefile has an 'island'. Currently this is not expected by the plugin but should be fixed or taken into account.
Traceback (most recent call last):
File "/home/rise/.qgis2/python/plugins/clusterpy_light/clusterpy_light.py", line 129, in maxp
tabumax)
File "/home/rise/.qgis2/python/plugins/clusterpy_light/clusterpy.py", line 189, in execmaxp
regions = assignenclaves(partitions, enclaves, assigned)
File "/home/rise/.qgis2/python/plugins/clusterpy_light/clusterpy.py", line 252, in assignenclaves
for neighbor in assignedneighbor:
TypeError: 'NoneType' object is not iterable
Apparently the Shapefile has an 'island'. Currently this is not expected by the plugin but should be fixed or taken into account.