java.io.IOException: cvc-complex-type.2.4.b: The content of element 'file' is not complete. One of '{"http://www.netbeans.org/ns/editor-bookmarks/1":line}' is expected.
        at org.netbeans.spi.project.support.ant.AntProjectHelper.saveXml(AntProjectHelper.java:322)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:584)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:100)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:138)
        at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.saveProject(AntBasedProjectFactorySingleton.java:221)
        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:216)
        at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.writeAccess(Mutex.java:426)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:600)
        at org.netbeans.modules.apisupport.project.NbModuleProject$OpenedHook.projectClosed(NbModuleProject.java:599)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:84)
        at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectClosed(UILookupMergerSupport.java:205)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:84)
        at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:995)
        at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:706)
        at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.closeAPI(OpenProjectsTrampolineImpl.java:75)
        at org.netbeans.api.project.ui.OpenProjects.close(OpenProjects.java:179)
        at org.netbeans.modules.project.ui.groups.Group.open(Group.java:327)
        at org.netbeans.modules.project.ui.groups.Group.setActiveGroup(Group.java:166)
        at org.netbeans.modules.project.ui.groups.GroupsMenu$Menu$1$1.run(GroupsMenu.java:117)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
org.xml.sax.SAXParseException: cvc-complex-type.2.4.b: The content of element 'file' is not complete. One of '{"http://www.netbeans.org/ns/editor-bookmarks/1":line}' is expected.
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$XSIErrorReporter.reportError(XMLSchemaValidator.java:410)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.reportSchemaError(XMLSchemaValidator.java:3165)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidComplexType(XMLSchemaValidator.java:3129)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.elementLocallyValidType(XMLSchemaValidator.java:3076)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.processElementContent(XMLSchemaValidator.java:2978)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.handleEndElement(XMLSchemaValidator.java:2121)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.endElement(XMLSchemaValidator.java:791)
        at com.sun.org.apache.xerces.internal.jaxp.validation.DOMValidatorHelper.finishNode(DOMValidatorHelper.java:338)
        at com.sun.org.apache.xerces.internal.jaxp.validation.DOMValidatorHelper.validate(DOMValidatorHelper.java:243)
        at com.sun.org.apache.xerces.internal.jaxp.validation.DOMValidatorHelper.validate(DOMValidatorHelper.java:186)
        at com.sun.org.apache.xerces.internal.jaxp.validation.ValidatorImpl.validate(ValidatorImpl.java:100)
        at javax.xml.validation.Validator.validate(Validator.java:127)
        at org.openide.xml.XMLUtil.validate(XMLUtil.java:500)
        at org.netbeans.modules.project.ant.ProjectXMLCatalogReader.validate(ProjectXMLCatalogReader.java:144)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.saveXml(AntProjectHelper.java:319)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:584)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:100)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:138)
        at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.saveProject(AntBasedProjectFactorySingleton.java:221)
        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:216)
        at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.writeAccess(Mutex.java:426)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:600)
        at org.netbeans.modules.apisupport.project.NbModuleProject$OpenedHook.projectClosed(NbModuleProject.java:599)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:84)
        at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectClosed(UILookupMergerSupport.java:205)
        at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:84)
        at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:995)
        at org.netbeans.modules.project.ui.OpenProjectList.close(OpenProjectList.java:706)
        at org.netbeans.modules.project.ui.OpenProjectsTrampolineImpl.closeAPI(OpenProjectsTrampolineImpl.java:75)
        at org.netbeans.api.project.ui.OpenProjects.close(OpenProjects.java:179)
        at org.netbeans.modules.project.ui.groups.Group.open(Group.java:327)
        at org.netbeans.modules.project.ui.groups.Group.setActiveGroup(Group.java:166)
        at org.netbeans.modules.project.ui.groups.GroupsMenu$Menu$1$1.run(GroupsMenu.java:117)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
Saving nbproject/private/private.xml in /space/src/nb/core-main/project.ant