I'm getting the exception below:
2015/08/01 11:40:18 WARN - com.atlantbh.jmeter.plugins.jsonutils.jsonpathextractor.JSONPathExtractor: Extract failed java.lang.IllegalArgumentException: Invalid container object
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:238)
at com.jayway.jsonpath.internal.JsonReader.read(JsonReader.java:103)
at com.jayway.jsonpath.internal.JsonReader.read(JsonReader.java:97)
at com.atlantbh.jmeter.plugins.jsonutils.jsonpathextractor.JSONPathExtractor.process(JSONPathExtractor.java:106)
at org.apache.jmeter.threads.JMeterThread.runPostProcessors(JMeterThread.java:750)
at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:452)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:261)
at java.lang.Thread.run(Thread.java:745)