Caused: org.netbeans.modules.masterfs.filebasedfs.utils.FSException: Cannot delete file SONIA in Y:/sites/all/modules/science/research_data/lib.
   at org.netbeans.modules.masterfs.filebasedfs.utils.FSException.io(FSException.java:118)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FolderObj.delete(FolderObj.java:411)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj$2.call(BaseFileObj.java:730)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj$2.call(BaseFileObj.java:725)
   at org.netbeans.modules.masterfs.filebasedfs.FileBasedFileSystem.runAsInconsistent(FileBasedFileSystem.java:119)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.BaseFileObj.delete(BaseFileObj.java:739)
   at org.openide.loaders.FileEntry$Folder.delete(FileEntry.java:458)
   at org.openide.loaders.MultiDataObject.handleDelete(MultiDataObject.java:631)
   at org.openide.loaders.DataFolder.handleDelete(DataFolder.java:665)
   at org.openide.loaders.DataObject$4.run(DataObject.java:644)
   at org.openide.loaders.DataObject$1WrapRun.run(DataObject.java:886)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.openide.loaders.DataObjectPool.runAtomicActionSimple(DataObjectPool.java:229)
   at org.openide.loaders.DataObject.invokeAtomicAction(DataObject.java:903)
   at org.openide.loaders.DataObject.delete(DataObject.java:642)
   at org.openide.loaders.DataNode.destroy(DataNode.java:315)
   at org.openide.nodes.FilterNode.destroy(FilterNode.java:613)
   at org.openide.nodes.FilterNode.destroy(FilterNode.java:613)
   at org.openide.nodes.FilterNode.destroy(FilterNode.java:613)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction$2.run(SafeDeleteAction.java:168)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:127)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.openide.filesystems.FileUtil.runAtomicAction(FileUtil.java:573)
   at org.netbeans.modules.refactoring.spi.impl.SafeDeleteAction.delete(SafeDeleteAction.java:164)
   at org.netbeans.modules.openide.explorer.ExplorerActionsImpl$DeleteActionPerformer.actionPerformed(ExplorerActionsImpl.java:626)
   at org.openide.util.actions.ActionInvoker$1.run(ActionInvoker.java:93)
   at org.openide.util.actions.ActionInvoker$ActionRunnable.actionPerformed(ActionInvoker.java:162)
   at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:109)
   at org.netbeans.modules.openide.actions.ActionsBridgeImpl.invokeAction(ActionsBridgeImpl.java:60)
   at org.openide.util.actions.ActionInvoker$ActionRunnable.doRun(ActionInvoker.java:153)
   at org.openide.util.actions.ActionInvoker$2.run(ActionInvoker.java:110)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)