rundat

java.lang.NullPointerException at java.io.DataInputStream.readByte(Unknown Source) at nbt.TagInputStream.readTag(TagInputStream.java:41) at pfaeff.IDChanger.changeIDs(IDChanger.java:574) at pfaeff.IDChanger$1.doInBackground(IDChanger.java:483) at javax.swing.SwingWorker$1.call(Unknown Source) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at javax.swing.SwingWorker.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) wat do? :-\