cmdowloader continuos errores

me genera un documento de texto en la carpeta del cmdowloader con este error alguien me podria echar una mano soy de bilbao si sirve esta informacion el error es este:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: cannot open system clipboard
at sun.awt.windows.WClipboard.openClipboard(Native Method)
at sun.awt.datatransfer.SunClipboard.getClipboardForm atsOpenClose(Unknown Source)
at sun.awt.datatransfer.SunClipboard.isDataFlavorAvai lable(Unknown Source)
at org.jdesktop.application.TextActions.updateTextAct ions(TextActions.java:132)
at org.jdesktop.application.TextActions.access$400(Te xtActions.java:47)
at org.jdesktop.application.TextActions$ClipboardList ener.flavorsChanged(TextActions.java:108)
at sun.awt.datatransfer.SunClipboard$1SunFlavorChange Notifier.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.awt.EventQueue$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.AccessControlContext$1.doIntersectio nPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(U nknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)