java.io.IOException: java.lang.NullPointerException

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java.io.IOException: java.lang.NullPointerException
at org.netbeans.modules.j2ee.earproject.ProjectEar.findDeploymentConfigurationFile(ProjectEar.java:409)
at org.netbeans.modules.j2ee.sun.share.config.ConfigDataLoader.findPrimaryFile(ConfigDataLoader.java:128)
at org.openide.loaders.MultiFileLoader.findPrimaryFileImpl(MultiFileLoader.java:262)
at org.openide.loaders.MultiFileLoader.handleFindDataObject(MultiFileLoader.java:65)
at org.openide.loaders.DataObjectPool.handleFindDataObject(DataObjectPool.java:123)
at org.openide.loaders.DataLoader.findDataObject(DataLoader.java:358)
at org.openide.loaders.DataLoaderPool.findDataObject(DataLoaderPool.java:402)
at org.openide.loaders.FolderList.createBoth(FolderList.java:701)
at org.openide.loaders.FolderList.access$600(FolderList.java:50)
at org.openide.loaders.FolderList$2.run(FolderList.java:334)
at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:493)
at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:926)

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