User diversity not robust against NULL User ids
ERROR: Exception in thread "main" com.beust.jcommander.ParameterException: "-uids": couldn't convert "None" to an integer
at com.beust.jcommander.converters.IntegerConverter.convert(IntegerConverter.java:38)
at com.beust.jcommander.converters.IntegerConverter.convert(IntegerConverter.java:28)
at com.beust.jcommander.JCommander.convertValue(JCommander.java:1333)
at com.beust.jcommander.JCommander$2.convert(JCommander.java:1316)
at com.beust.jcommander.converters.DefaultListConverter.convert(DefaultListConverter.java:32)
at com.beust.jcommander.converters.DefaultListConverter.convert(DefaultListConverter.java:13)
at com.beust.jcommander.JCommander.convertValue(JCommander.java:1333)
at com.beust.jcommander.ParameterDescription.addValue(ParameterDescription.java:249)
at com.beust.jcommander.JCommander.processFixedArity(JCommander.java:913)
at com.beust.jcommander.JCommander.processFixedArity(JCommander.java:894)
at com.beust.jcommander.JCommander.parseValues(JCommander.java:724)
at com.beust.jcommander.JCommander.parse(JCommander.java:356)
at com.beust.jcommander.JCommander.parse(JCommander.java:335)
at org.giscience.user.diversity.GetUserGroupContribs.main(GetUserGroupContribs.java:37)
at automatic_workflow.py diversity:1812