[news.eclipse.tools.gef] NullPointException

[penzhan8451@xxxxxxxxx (smallfish)]

Hi,

   Now I encountered a problem : After i deleted a project in workspace, 
then 

actived my editor , but a exception was throwed like below :


          ..................
          java.lang.NullPointerException
	at org.eclipse.swt.widgets.Canvas.WM_SETFOCUS(Canvas.java:217)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:2868)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:2547)
	at org.eclipse.swt.internal.win32.OS.SetFocus(Native Method)
	at org.eclipse.swt.widgets.Control.forceFocus(Control.java:603)
	at org.eclipse.swt.widgets.Control.setSavedFocus(Control.java:2161)
	at org.eclipse.swt.widgets.Decorations.restoreFocus(Decorations.java:653)
	at org.eclipse.swt.widgets.Decorations.WM_ACTIVATE(Decorations.java:1270)
	at org.eclipse.swt.widgets.Shell.WM_ACTIVATE(Shell.java:1168)
	at org.eclipse.swt.widgets.Control.windowProc(Control.java:2868)
	at org.eclipse.swt.widgets.Decorations.windowProc(Decorations.java:1229)
	at org.eclipse.swt.widgets.Display.windowProc(Display.java:2547)
	at org.eclipse.swt.internal.win32.OS.PeekMessageW(Native Method)
	at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:1697)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1733)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1408)
	at org.eclipse.ui.internal.Workbench.run(Workbench.java:1392)
	at 
org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:865)
	at org.eclipse.core.boot.BootLoader.run(BootLoader.java:461)
	at java.lang.reflect.Method.invoke(Native Method)
	at org.eclipse.core.launcher.Main.basicRun(Main.java:296)
	at org.eclipse.core.launcher.Main.run(Main.java:747)
	at org.eclipse.core.launcher.Main.main(Main.java:596)
	at org.eclipse.swt.internal.win32.OS.PeekMessage(OS.java:1697)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:1733)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1408)
	at org.eclipse.ui.internal.Workbench.run(Workbench.java:1392)
	at 
org.eclipse.core.internal.boot.InternalBootLoader.run(InternalBootLoader.java:865)

....................

       I didn't know what happened. Would you like to tell me how to 
solve 

       it ?

  Thanks & best regards.