java.lang.IllegalArgumentException: C:\Users\Mark\Documents\NetBeansProjects\JavaApplication75\src\javaapplication74\JavaApplication7.java@e5f442dd:1baeab2 is not inside C:\Users\Mark\Documents\NetBeansProjects\JavaApplication75\src@e76f7583:1d37976
   at org.netbeans.spi.project.support.ant.SourcesHelper$SourceRoot$Group.contains(SourcesHelper.java:203)
   at org.netbeans.spi.java.project.support.ui.PackageViewChildren$NoFoldersDataFilter.acceptFileObject(PackageViewChildren.java:1232)
   at org.openide.loaders.FolderChildren$1R.run(FolderChildren.java:174)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.IllegalArgumentException: C:\Users\Mark\Documents\NetBeansProjects\JavaApplication75\src\javaapplication74\JavaApplication7.java@e5f442dd:1baeab2 is not inside C:\Users\Mark\Documents\NetBeansProjects\JavaApplication75\src@e76f7583:1d37976
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:428)
   at org.openide.loaders.FolderChildren.refreshChildren(FolderChildren.java:205)
   at org.openide.loaders.FolderChildren.propertyChange(FolderChildren.java:139)
   at org.openide.util.WeakListenerImpl$PropertyChange.propertyChange(WeakListenerImpl.java:196)
   at java.beans.PropertyChangeSupport.fire(PropertyChangeSupport.java:335)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:327)
   at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:263)
   at org.openide.loaders.FolderList.refresh(FolderList.java:380)
   at org.openide.loaders.FolderList.changedDataSystem(FolderList.java:247)
   at org.openide.loaders.DataObjectPool$Validator.refreshFolderOf(DataObjectPool.java:1143)
   at org.openide.loaders.DataObjectPool.deregister(DataObjectPool.java:849)
   at org.openide.loaders.DataObjectPool.access$800(DataObjectPool.java:60)
   at org.openide.loaders.DataObjectPool$Item.deregister(DataObjectPool.java:987)
   at org.openide.loaders.DataObject.dispose(DataObject.java:200)
   at org.openide.loaders.DataObject.markInvalid0(DataObject.java:225)
   at org.openide.loaders.MultiDataObject.notifyFileDeleted(MultiDataObject.java:1394)
   at org.openide.loaders.DataObjectPool$FSListener.fileDeleted(DataObjectPool.java:638)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEventImpl(FCLSupport.java:148)
   at org.openide.filesystems.FCLSupport$DispatchEventWrapper.dispatchEvent(FCLSupport.java:128)
   at org.openide.filesystems.FCLSupport.dispatchEvent(FCLSupport.java:105)
   at org.openide.filesystems.FileObject$ED.dispatch(FileObject.java:1203)
   at org.openide.filesystems.EventControl.invokeDispatchers(EventControl.java:213)
   at org.openide.filesystems.EventControl.exitAtomicAction(EventControl.java:188)
   at org.openide.filesystems.EventControl.runAtomicAction(EventControl.java:129)
   at org.openide.filesystems.FileSystem.runAtomicAction(FileSystem.java:566)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.FileObjectFactory.refresh(FileObjectFactory.java:722)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.invokeRefreshFor(RootObj.java:197)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.invokeRefreshFor(RootObj.java:145)
   at org.netbeans.modules.masterfs.filebasedfs.fileobjects.RootObj.setAttribute(RootObj.java:138)
   at org.openide.filesystems.FileUtil.refreshFor(FileUtil.java:165)
   at org.openide.filesystems.FileUtil$1.run(FileUtil.java:188)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1411)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1991)