java.lang.NullPointerException
        at org.netbeans.spi.java.project.classpath.ProjectClassPathModifierImplementation.convertURLsToURIs(ProjectClassPathModifierImplementation.java:194)
        at org.netbeans.modules.j2ee.common.project.classpath.ClassPathModifier.addRoots(ClassPathModifier.java:134)
        at org.netbeans.spi.java.project.classpath.ProjectClassPathModifierImplementation$Accessor.addRoots(ProjectClassPathModifierImplementation.java:407)
        at org.netbeans.api.java.project.classpath.ProjectClassPathModifier.addRoots(ProjectClassPathModifier.java:142)
        at org.netbeans.modules.projectimport.eclipse.core.spi.ProjectFactorySupport.addItemToClassPath(ProjectFactorySupport.java:339)
        at org.netbeans.modules.projectimport.eclipse.core.spi.ProjectFactorySupport.updateProjectClassPath(ProjectFactorySupport.java:107)
        at org.netbeans.modules.projectimport.eclipse.web.WebProjectFactory.createProject(WebProjectFactory.java:223)
        at org.netbeans.modules.projectimport.eclipse.core.Importer.importProjectStage1(Importer.java:233)
        at org.netbeans.modules.projectimport.eclipse.core.Importer.access$600(Importer.java:69)
        at org.netbeans.modules.projectimport.eclipse.core.Importer$3.run(Importer.java:178)
        at org.netbeans.modules.projectimport.eclipse.core.Importer$3.run(Importer.java:176)
        at org.openide.util.Mutex.writeAccess(Mutex.java:394)
        at org.netbeans.modules.projectimport.eclipse.core.Importer.importProject(Importer.java:175)
        at org.netbeans.modules.projectimport.eclipse.core.Importer.access$200(Importer.java:69)
        at org.netbeans.modules.projectimport.eclipse.core.Importer$1.run(Importer.java:108)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)