java.io.IOException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'extension'. One of '{"http://www.netbeans.org/ns/ant-build-extender/1":extension}' is expected.
        at org.netbeans.spi.project.support.ant.AntProjectHelper.saveXml(AntProjectHelper.java:321)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:589)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:99)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:137)
        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$1R.run(Mutex.java:1305)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1318)
        at org.openide.util.Mutex.writeAccess(Mutex.java:426)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:600)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.saveModifiedProject(CustomizerDialog.java:297)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.access$500(CustomizerDialog.java:188)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2$1.run(CustomizerDialog.java:248)
        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:215)
        at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.writeAccess(Mutex.java:384)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2.run(CustomizerDialog.java:240)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
org.xml.sax.SAXParseException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'extension'. One of '{"http://www.netbeans.org/ns/ant-build-extender/1":extension}' is expected.
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
        at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
        at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator$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.handleStartElement(XMLSchemaValidator.java:1777)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaValidator.startElement(XMLSchemaValidator.java:685)
        at com.sun.org.apache.xerces.internal.jaxp.validation.DOMValidatorHelper.beginNode(DOMValidatorHelper.java:273)
        at com.sun.org.apache.xerces.internal.jaxp.validation.DOMValidatorHelper.validate(DOMValidatorHelper.java:240)
        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:496)
        at org.netbeans.modules.project.ant.ProjectXMLCatalogReader.validate(ProjectXMLCatalogReader.java:144)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.saveXml(AntProjectHelper.java:318)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:589)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:99)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:137)
        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$1R.run(Mutex.java:1305)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1318)
        at org.openide.util.Mutex.writeAccess(Mutex.java:426)
        at org.netbeans.api.project.ProjectManager.saveProject(ProjectManager.java:600)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.saveModifiedProject(CustomizerDialog.java:297)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener.access$500(CustomizerDialog.java:188)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2$1.run(CustomizerDialog.java:248)
        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:215)
        at org.netbeans.api.project.ProjectManager$2.execute(ProjectManager.java:118)
        at org.openide.util.Mutex.doWrapperAccess(Mutex.java:1320)
        at org.openide.util.Mutex.writeAccess(Mutex.java:384)
        at org.netbeans.modules.project.uiapi.CustomizerDialog$OptionListener$2.run(CustomizerDialog.java:240)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)
Saving nbproject/project.xml in /home/dshe/spbuild