evosuite-report is not created for defuse criterion

[mijungk]

Hello. I've been using defuse criterion lately and facing a couple of errors.
The first error is that with defuse criterion, Evosuite does not provide statistics.csv in evosuite-report. At the end of a run, it says

[main] ERROR SearchStatistics - No statistics has been saved because EvoSuite failed to generate any test case
[main] ERROR TestGeneration - failed to write statistics data

However, Evosuite did generate some test cases in this run.
Also, during the run, it constatntly produces the following exception.

[MASTER] 13:35:51.727 [logback-2] ERROR ClientNodeImpl - Cannot inform master of change of state
java.rmi.MarshalException: error marshalling arguments; nested exception is:
	java.net.SocketException: Broken pipe
	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:158) ~[na:1.8.0_45]
	at java.rmi.server.RemoteObjectInvocationHandler.invokeRemoteMethod(RemoteObjectInvocationHandler.java:194) ~[na:1.8.0_45]
	at java.rmi.server.RemoteObjectInvocationHandler.invoke(RemoteObjectInvocationHandler.java:148) ~[na:1.8.0_45]
	at com.sun.proxy.$Proxy7.evosuite_collectStatistics(Unknown Source) ~[na:na]
	at org.evosuite.rmi.service.ClientNodeImpl.updateStatistics(ClientNodeImpl.java:237) ~[evosuite-current.jar:1.0.7-SNAPSHOT]
	at org.evosuite.statistics.StatisticsSender.sendIndividualToMaster(StatisticsSender.java:68) [evosuite-current.jar:1.0.7-SNAPSHOT]
	at org.evosuite.statistics.StatisticsListener$1.run(StatisticsListener.java:71) [evosuite-current.jar:1.0.7-SNAPSHOT]
Caused by: java.net.SocketException: Broken pipe
	at java.net.SocketOutputStream.socketWrite0(Native Method) ~[na:1.8.0_45]
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109) ~[na:1.8.0_45]
	at java.net.SocketOutputStream.write(SocketOutputStream.java:153) ~[na:1.8.0_45]
	at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) ~[na:1.8.0_45]
	at java.io.BufferedOutputStream.write(BufferedOutputStream.java:126) ~[na:1.8.0_45]
	at java.io.ObjectOutputStream$BlockDataOutputStream.writeBlockHeader(ObjectOutputStream.java:1890) ~[na:1.8.0_45]
	at java.io.ObjectOutputStream$BlockDataOutputStream.drain(ObjectOutputStream.java:1875) ~[na:1.8.0_45]
	at java.io.ObjectOutputStream$BlockDataOutputStream.setBlockDataMode(ObjectOutputStream.java:1786) ~[na:1.8.0_45]
	at java.io.ObjectOutputStream.writeFatalException(ObjectOutputStream.java:1574) ~[na:1.8.0_45]
	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:351) ~[na:1.8.0_45]
	at sun.rmi.server.UnicastRef.marshalValue(UnicastRef.java:294) ~[na:1.8.0_45]
	at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:153) ~[na:1.8.0_45]