jacob获取属性，报错com.jacob.com.ComFailExcepti?报错

我在调用其他公司提供的DLL,获取属性的时候：

，报了这个错：

com.jacob.com.ComFailException: A COM exception has been encountered:
At Invoke of: FPJE
Description: ??Ч??????????


at com.jacob.com.Dispatch.invokev(Native Method)
at com.jacob.com.Dispatch.invokev(Dispatch.java:804)
at com.jacob.com.Dispatch.get(Dispatch.java:1153)
at nc.ui.so.so002.SaleInvoiceUI.onSoTax(SaleInvoiceUI.java:2837)
at nc.ui.so.so002.SaleInvoiceUI.onButtonClicked(SaleInvoiceUI.java:6390)
at nc.ui.pub.ToftPanel.handleButtonEvent(ToftPanel.java:204)
at nc.ui.pub.FramePanel.dispatchButtonEvent(FramePanel.java:309)
at nc.ui.pub.FramePanel.access$100(FramePanel.java:58)
at nc.ui.pub.FramePanel$ButtonHandler.buttonClicked(FramePanel.java:181)
at nc.ui.pub.ButtonBar.firePostEvent(ButtonBar.java:357)
at nc.ui.pub.ButtonBar$1.run(ButtonBar.java:225)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)