Opening a gexf with kind defined on edges :

Running Modularity raise an error and makes gephi unusable .

java.lang.NullPointerException
at org.gephi.graph.impl.EdgeStore$UndirectedIterator.hasNext(EdgeStore.java:1771)
at org.gephi.statistics.plugin.Modularity$CommunityStructure.(Modularity.java:184)
at org.gephi.statistics.plugin.Modularity.execute(Modularity.java:477)
at org.gephi.statistics.plugin.Modularity.execute(Modularity.java:469)
at org.gephi.statistics.StatisticsControllerImpl.execute(StatisticsControllerImpl.java:162)
at org.gephi.statistics.StatisticsControllerImpl$3.run(StatisticsControllerImpl.java:149)
[catch] at org.gephi.utils.longtask.api.LongTaskExecutor$RunningLongTask.run(LongTaskExecutor.java:274)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)