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Valdhor
6 May 2014, 10:26 AM
I downloaded and installed Sencha cmd 5 and started working through the getting started guide. Note that I am a complete newbie with Ext-js.

I leave my command window open at the "Waiting for changes..." and I go out to lunch (Or just do different work). If I leave it like that for an hour or so I will get an error message stating

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: sun.java2d.
HeadlessGraphicsEnvironment cannot be cast to sun.awt.Win32GraphicsEnvironment
at sun.awt.windows.WToolkit$3.run(WToolkit.java:758)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)


at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)


at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: sun.java2d.
HeadlessGraphicsEnvironment cannot be cast to sun.awt.Win32GraphicsEnvironment
at sun.awt.windows.WToolkit$3.run(WToolkit.java:758)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)


at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)


at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

I am using Windows 7 64-bit on a Dell Laptop with an Intel Core I7 Quad core processor and 8GB of RAM if that helps.

mitchellsimoens
8 May 2014, 12:58 PM
Thanks for the report! I have opened a bug in our bug tracker.