使用Kettle流程控制功能时触发空指针异常问题求助

我点击Kettle流程控制按钮后，程序立即运行报错。

以下是点击详情按钮后显示的错误代码：

java.lang.NullPointerException
 at org.pentaho.di.ui.spoon.Spoon$16.mouseMove(Spoon.java:2182)
 at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)
 at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)
 at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)
 at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)
 at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)
 at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)
 at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1381)
 at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7817)
 at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9179)
 at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:707)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:498)
 at org.pentaho.commons.launcher.Launcher.main(Launcher.java:92)

内容的提问来源于stack exchange，提问作者Huang