java.lang.IllegalArgumentException: Project J2SEProject[Q:\projects\hymerfania\JNIAntTasks] not created by org.netbeans.api.project.ProjectManager@748fdb or was already deleted
        at org.netbeans.api.project.ProjectManager$6.run(ProjectManager.java:639)
        at org.netbeans.api.project.ProjectManager$6.run(ProjectManager.java:632)
        at org.openide.util.Mutex.writeAccess(Mutex.java:433)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:632)
        at org.netbeans.modules.java.j2seproject.J2SEProject$ProjectOpenedHookImpl$1$1.run(J2SEProject.java:601)
        at org.netbeans.modules.java.j2seproject.J2SEProject$ProjectOpenedHookImpl$1$1.run(J2SEProject.java:549)
        at org.openide.util.Mutex.writeAccess(Mutex.java:394)
        at org.netbeans.modules.java.j2seproject.J2SEProject$ProjectOpenedHookImpl$1.run(J2SEProject.java:549)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:509)
        at org.netbeans.modules.java.j2seproject.J2SEProject$ProjectOpenedHookImpl.projectOpened(J2SEProject.java:547)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
        at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectOpened(UILookupMergerSupport.java:193)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectOpened(ProjectOpenedHook.java:81)
        at org.netbeans.modules.project.ui.OpenProjectList.notifyOpened(OpenProjectList.java:1059)
        at org.netbeans.modules.project.ui.OpenProjectList.access$800(OpenProjectList.java:122)
        at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.loadOnBackground(OpenProjectList.java:401)
        at org.netbeans.modules.project.ui.OpenProjectList$LoadOpenProjects.run(OpenProjectList.java:309)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)