callout调用出错问题，特急！

M4A1

我在eclipse下开发的callout原来都是在eclipse的调试模式下运行，没有任何问题，今天callout做完了，我通过把callout生成customization.jar重新部署了一次后，再次进入系统新建记录时，就报java.lang.NullPointerException错误。我看了错误代码，在eclipse下的控制台输出代码和在我重新部署后的控制台输出代码是一样的，错误代码如下：
01:32:31.262     GridTab.fireDataStatusChanged: DataStatusEvent - Inserted  : +*2/9 [13]
01:32:31.262 APanel.dataStatusChanged: +*2/9 [13]
01:32:31.263     APanel.setStatusLine: Inserted [13]
01:32:31.263   VTabbedPane.evaluate:  [13]
01:32:31.263   GridController.dataStatusChanged: (MTab #0 设备变动 (1000013)) Col=-1: DataStatusEvent - Inserted  : +*2/9 [13]
01:32:31.263   GridController.dynamicDisplay: MTab #0 设备变动 (1000013) - Rows=9 [13]
01:32:31.265   GridController.dynamicDisplay: MTab #0 设备变动 (1000013) - fini - complete [13]
01:32:31.266     GridTab.processCallout: stationcode=null (org.adempiere.usercustomer.chinamobile.UpdateMobilestation.getStationName) - old=null [13]
01:32:31.317 UpdateMobilestation.start: getStationName - stationcode=null (old=null) {active=false} [13]
01:32:31.319     UpdateMobilestation.getStationName: 执行到return [13]
===========> APanel.actionPerformed: New [13]
java.lang.NullPointerException
    at org.compiere.model.GridTab.processCallout(GridTab.java:2636)
    at org.compiere.model.GridTab.dataNew(GridTab.java:957)
    at org.compiere.apps.APanel.cmd_new(APanel.java:1664)
    at org.compiere.apps.APanel.actionPerformed(APanel.java:1496)
    at org.compiere.apps.AppsAction.actionPerformed(AppsAction.java:266)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
    at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
    at java.awt.Component.processMouseEvent(Component.java:6134)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
    at java.awt.Component.processEvent(Component.java:5899)
    at java.awt.Container.processEvent(Container.java:2023)
    at java.awt.Component.dispatchEventImpl(Component.java:4501)
    at java.awt.Container.dispatchEventImpl(Container.java:2081)
    at java.awt.Component.dispatchEvent(Component.java:4331)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4301)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3965)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3895)