送分！！！求助！！！

希望有用过Kettle工具的哥哥，姐姐们帮帮忙！我的Kettle工具刚开始能用，可是过了几天再用就启动不了，一直报一个致命的错误，请各位帮忙！报错信息：致命错误！Argument not valid点击细节，显示的报错信息如下：    java.lang.IllegalArgumentException: Argument not valid
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.SWT.error(Unknown Source)
at org.eclipse.swt.widgets.Control.setBackground(Unknown Source)
at org.eclipse.swt.custom.SashFormLayout.layout(Unknown Source)
at org.eclipse.swt.widgets.Composite.updateLayout(Unknown Source)
at org.eclipse.swt.widgets.Composite.WM_SIZE(Unknown Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.DefWindowProcW(Native Method)
at org.eclipse.swt.internal.win32.OS.DefWindowProc(Unknown Source)
at org.eclipse.swt.widgets.Scrollable.callWindowProc(Unknown Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.SetWindowPos(Native Method)
at org.eclipse.swt.widgets.Widget.SetWindowPos(Unknown Source)
at org.eclipse.swt.widgets.Control.setBounds(Unknown Source)
at org.eclipse.swt.widgets.Control.setBounds(Unknown Source)
at org.eclipse.swt.widgets.Control.setBounds(Unknown Source)
at org.eclipse.swt.widgets.Control.setBounds(Unknown Source)
at org.eclipse.swt.layout.FormLayout.layout(Unknown Source)
at org.eclipse.swt.layout.FormLayout.layout(Unknown Source)
at org.eclipse.swt.widgets.Composite.updateLayout(Unknown Source)
at org.eclipse.swt.widgets.Composite.WM_SIZE(Unknown Source)
at org.eclipse.swt.widgets.Canvas.WM_SIZE(Unknown Source)
at org.eclipse.swt.widgets.Decorations.WM_SIZE(Unknown Source)
at org.eclipse.swt.widgets.Control.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Canvas.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Decorations.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Shell.windowProc(Unknown Source)
at org.eclipse.swt.widgets.Display.windowProc(Unknown Source)
at org.eclipse.swt.internal.win32.OS.BringWindowToTop(Native Method)
at org.eclipse.swt.widgets.Decorations.bringToTop(Unknown Source)
at org.eclipse.swt.widgets.Shell.open(Unknown Source)
at org.pentaho.di.ui.spoon.Spoon.open(Spoon.java:913)
at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:6181)
at org.pentaho.di.ui.spoon.Spoon.run(Spoon.java:6286)
at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:404)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.pentaho.commons.launcher.Launcher.main(Launcher.java:116)