java.lang.IllegalArgumentException: Attempt to remove nonexistent path [D:\opt\Java\jdk1.7.0\jre\lib\resources.jar;D:\opt\Java\jdk1.7.0\jre\lib\rt.jar;D:\opt\Java\jdk1.7.0\jre\lib\sunrsasign.jar;D:\opt\Java\jdk1.7.0\jre\lib\jsse.jar;D:\opt\Java\jdk1.7.0\jre\lib\jce.jar;D:\opt\Java\jdk1.7.0\jre\lib\charsets.jar;D:\opt\Java\jdk1.7.0\jre\classes;D:\opt\Java\jdk1.7.0\jre\lib\ext\dnsns.jar;D:\opt\Java\jdk1.7.0\jre\lib\ext\localedata.jar;D:\opt\Java\jdk1.7.0\jre\lib\ext\sunec.jar;D:\opt\Java\jdk1.7.0\jre\lib\ext\sunjce_provider.jar;D:\opt\Java\jdk1.7.0\jre\lib\ext\sunmscapi.jar;D:\opt\Java\jdk1.7.0\jre\lib\ext\zipfs.jar] from list of registered paths [[]] for id classpath/boot. All paths: {}
   at org.netbeans.api.java.classpath.GlobalPathRegistry.unregister(GlobalPathRegistry.java:241)
   at org.netbeans.modules.maven.ProjectOpenedHookImpl.projectClosed(ProjectOpenedHookImpl.java:257)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:87)
   at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectClosed(UILookupMergerSupport.java:211)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:87)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:1150)
   at org.netbeans.modules.project.ui.OpenProjectList.access$2600(OpenProjectList.java:132)
   at org.netbeans.modules.project.ui.OpenProjectList$8.run(OpenProjectList.java:822)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)