title: Jmeter execution error shows i.e. jmeter.threads.JMeterThread: Test failed! java.lang.IllegalArgumentException: Filename must not be null or empty
body: <p>I am trying to execute the test script and showing the below error. Any help would be greatly appreciated.</p>
  
  <pre><code>ERROR - jmeter.threads.JMeterThread: Test failed! java.lang.IllegalArgumentException: Filename must not be null or empty
  </code></pre>
  
  <p>Total error code is:</p>
  
  <pre><code>2016/12/06 19:05:13 INFO  - jmeter.engine.StandardJMeterEngine: Running the test! 
  2016/12/06 19:05:13 INFO  - jmeter.samplers.SampleEvent: List of sample_variables: [] 
  2016/12/06 19:05:13 INFO  - jmeter.gui.util.JMeterMenuBar: setRunning(true,*local*) 
  2016/12/06 19:05:14 INFO  - jmeter.engine.StandardJMeterEngine: Starting ThreadGroup: 1 : www.cebsworldwide.com 
  2016/12/06 19:05:14 INFO  - jmeter.engine.StandardJMeterEngine: Starting 5 threads for group www.cebsworldwide.com. 
  2016/12/06 19:05:14 INFO  - jmeter.engine.StandardJMeterEngine: Thread will continue on error 
  2016/12/06 19:05:14 INFO  - jmeter.threads.ThreadGroup: Starting thread group number 1 threads 5 ramp-up 1 perThread 200.0 delayedStart=false 
  2016/12/06 19:05:14 INFO  - jmeter.threads.JMeterThread: Thread started: www.cebsworldwide.com 1-1 
  2016/12/06 19:05:14 ERROR - jmeter.threads.JMeterThread: Test failed! java.lang.IllegalArgumentException: Filename must not be null or empty
      at org.apache.jmeter.services.FileServer.reserveFile(FileServer.java:262)
      at org.apache.jmeter.config.CSVDataSet.iterationStart(CSVDataSet.java:178)
      at org.apache.jmeter.control.GenericController.fireIterationStart(GenericController.java:405)
      at org.apache.jmeter.control.GenericController.fireIterEvents(GenericController.java:397)
      at org.apache.jmeter.control.GenericController.next(GenericController.java:158)
      at org.apache.jmeter.control.LoopController.next(LoopController.java:123)
      at org.apache.jmeter.threads.AbstractThreadGroup.next(AbstractThreadGroup.java:87)
      at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:247)
      at java.lang.Thread.run(Unknown Source)
  </code></pre>