java.lang.AssertionError
        at org.netbeans.spi.project.support.ant.ProjectProperties$PP.write(ProjectProperties.java:216)
        at org.netbeans.spi.project.support.ant.ProjectProperties.write(ProjectProperties.java:133)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:567)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:91)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:129)
        at 
org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.saveProject(AntBasedProjectFactorySingleton.java:215)
        at org.netbeans.api.project.ProjectManager$7.run(ProjectManager.java:611)
        at org.netbeans.api.project.ProjectManager$7.run(ProjectManager.java:601)
        at org.openide.util.Mutex.writeAccess(Mutex.java:433)
        at org.openide.util.Mutex$1R.run(Mutex.java:1305)
        at org.netbeans.api.project.ProjectManager$2$1.run(ProjectManager.java:120)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499)
        at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:161)
        at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.writeAccess(Mutex.java:426)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:600)
        at 
org.netbeans.modules.j2ee.clientproject.api.AppClientProjectGenerator.createProjectImpl(AppClientProjectGenerator.java:167)
        at org.netbeans.modules.j2ee.clientproject.api.AppClientProjectGenerator.access$000
(AppClientProjectGenerator.java:98)
        at 
org.netbeans.modules.j2ee.clientproject.api.AppClientProjectGenerator$1.run(AppClientProjectGenerator.java:135)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:499)
        at 
org.netbeans.modules.j2ee.clientproject.api.AppClientProjectGenerator.createProject(AppClientProjectGenerator.java:133)
        at 
org.netbeans.modules.j2ee.earproject.ui.wizards.NewEarProjectWizardIterator.testableInstantiate(NewEarProjectWizardIterator.java:212)
        at 
org.netbeans.modules.j2ee.earproject.ui.wizards.NewEarProjectWizardIteratorTest.generateEARProject(NewEarProjectWizardIteratorTest.java:86)
        at 
org.netbeans.modules.j2ee.earproject.ui.customizer.EarProjectPropertiesTest.setUp(EarProjectPropertiesTest.java:103)
        at org.netbeans.junit.NbTestCase.runBare(NbTestCase.java:306)
        at junit.framework.TestResult$1.protect(TestResult.java:106)
        at junit.framework.TestResult.runProtected(TestResult.java:124)
        at junit.framework.TestResult.run(TestResult.java:109)
        at junit.framework.TestCase.run(TestCase.java:120)
        at org.netbeans.junit.NbTestCase.run(NbTestCase.java:192)
        at junit.framework.TestSuite.runTest(TestSuite.java:230)
        at junit.framework.TestSuite.run(TestSuite.java:225)
        at org.netbeans.xtest.testrunner.JUnitTestRunner.runTests(JUnitTestRunner.java:191)
        at org.netbeans.xtest.testrunner.JUnitTestRunner.runTests(JUnitTestRunner.java:146)
        at org.netbeans.xtest.plugin.jvm.JUnitTestRunnerLauncher.main(JUnitTestRunnerLauncher.java:82)