java.lang.Throwable: Locked by:
   at org.openide.filesystems.FileLock.<init>(FileLock.java:85)
   at org.openide.filesystems.MultiFileObject$MfLock.<init>(MultiFileObject.java:1681)
   at org.openide.filesystems.MultiFileObject.lock(MultiFileObject.java:712)
   at org.openide.filesystems.FileObject.getOutputStream(FileObject.java:732)
   at org.netbeans.modules.db.sql.history.SQLHistoryManager.save(SQLHistoryManager.java:155)
   at org.netbeans.modules.db.sql.execute.SQLExecuteHelper.execute(SQLExecuteHelper.java:153)
   at org.netbeans.modules.db.sql.loader.SQLEditorSupport$SQLExecutor.run(SQLEditorSupport.java:564)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)