java.lang.IllegalArgumentException: Already a /Users/nb/Documents/nbtemp-project/73-temp2/HTML5Application8/nbproject/project.xml@e7d36c29:418f2cb2
   at org.netbeans.spi.project.support.ant.ProjectGenerator$1.run(ProjectGenerator.java:127)
   at org.netbeans.spi.project.support.ant.ProjectGenerator$1.run(ProjectGenerator.java:122)
   at org.openide.util.Mutex.writeAccess(Mutex.java:438)
   at org.netbeans.spi.project.support.ant.ProjectGenerator.createProject0(ProjectGenerator.java:122)
   at org.netbeans.spi.project.support.ant.ProjectGenerator.createProject(ProjectGenerator.java:103)
   at org.netbeans.modules.web.clientproject.util.ClientSideProjectUtilities.setupProject(ClientSideProjectUtilities.java:110)
   at org.netbeans.modules.web.clientproject.ui.wizard.ClientSideProjectWizardIterator.instantiate(ClientSideProjectWizardIterator.java:124)
   at org.openide.loaders.TemplateWizard$InstantiatingIteratorBridge.instantiate(TemplateWizard.java:1036)
   at org.openide.loaders.TemplateWizard.handleInstantiate(TemplateWizard.java:602)
   at org.openide.loaders.TemplateWizard.instantiateNewObjects(TemplateWizard.java:439)
   at org.openide.loaders.TemplateWizardIterImpl.instantiate(TemplateWizardIterImpl.java:253)
   at org.openide.loaders.TemplateWizardIteratorWrapper$ProgressInstantiatingIterator.instantiate(TemplateWizardIteratorWrapper.java:180)
   at org.openide.WizardDescriptor.callInstantiateOpen(WizardDescriptor.java:1555)
   at org.openide.WizardDescriptor.callInstantiate(WizardDescriptor.java:1499)
   at org.openide.WizardDescriptor.access$2100(WizardDescriptor.java:89)
   at org.openide.WizardDescriptor$Listener$3$1.run(WizardDescriptor.java:2149)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1454)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2036)