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java.lang.NullPointerException at java.io.Writer.write(Writer.java:157) at client.handingXML.GetCommand(handingXML.java:252) at client.SimpleTimerTask.run(SimpleTimerTask.java:21) at java.util.TimerThread.mainLoop(Timer.java:534) at java.util.TimerThread.run(Timer.java:484)