org.openide.filesystems.FileAlreadyLockedException: /home/mbains/workspace/general_c_runs/radcode/nbproject/private/private.xml
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.registerLock(LockForFile.java:112)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.LockForFile.tryLock(LockForFile.java:101)
        at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObj.lock(FileObj.java:296)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$2.run(AntProjectHelper.java:337)
        at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:120)
        at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:509)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.saveXml(AntProjectHelper.java:329)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.save(AntProjectHelper.java:592)
        at org.netbeans.spi.project.support.ant.AntProjectHelper.access$100(AntProjectHelper.java:102)
        at org.netbeans.spi.project.support.ant.AntProjectHelper$1.save(AntProjectHelper.java:140)
        at org.netbeans.modules.project.ant.AntBasedProjectFactorySingleton.saveProject(AntBasedProjectFactorySingleton.java:346)
        at org.netbeans.api.project.ProjectManager$6.run(ProjectManager.java:643)
        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.cnd.makeproject.api.configurations.MakeConfigurationDescriptor.ConfigurationProjectXMLWriter(MakeConfigurationDescriptor.java:746)
        at org.netbeans.modules.cnd.makeproject.api.configurations.MakeConfigurationDescriptor.saveWorker(MakeConfigurationDescriptor.java:694)
        at org.netbeans.modules.cnd.makeproject.api.configurations.MakeConfigurationDescriptor.access$000(MakeConfigurationDescriptor.java:97)
        at org.netbeans.modules.cnd.makeproject.api.configurations.MakeConfigurationDescriptor$SaveRunnable.run(MakeConfigurationDescriptor.java:620)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:577)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1030)