java.lang.IllegalArgumentException: Already a org.netbeans.modules.python.project2.PythonProject2 in /Users/stefano/Code/MoB/nidar-MoB@cf24fd70:154770f7
   at org.netbeans.spi.project.support.ant.ProjectGenerator$1.run(ProjectGenerator.java:139)
   at org.netbeans.spi.project.support.ant.ProjectGenerator$1.run(ProjectGenerator.java:122)
   at org.netbeans.modules.openide.util.DefaultMutexImplementation.writeAccess(DefaultMutexImplementation.java:293)
   at org.openide.util.Mutex.writeAccess(Mutex.java:299)
   at org.netbeans.spi.project.support.ant.ProjectGenerator.createProject0(ProjectGenerator.java:122)
   at org.netbeans.spi.project.support.ant.ProjectGenerator.createProject(ProjectGenerator.java:103)
   at org.netbeans.modules.python.project.templates.NewPythonProjectWizardIterator.createProject(NewPythonProjectWizardIterator.java:234)
   at org.netbeans.modules.python.project.templates.NewPythonProjectWizardIterator.instantiate(NewPythonProjectWizardIterator.java:110)
   at org.openide.loaders.TemplateWizard$InstantiatingIteratorBridge.instantiate(TemplateWizard.java:1051)
   at org.openide.loaders.TemplateWizard.handleInstantiate(TemplateWizard.java:605)
   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:1626)
   at org.openide.WizardDescriptor.callInstantiate(WizardDescriptor.java:1570)
   at org.openide.WizardDescriptor.access$2300(WizardDescriptor.java:92)
   at org.openide.WizardDescriptor$Listener$2$1.run(WizardDescriptor.java:2257)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)