WatiN“无法转换COM对象”exception

我的监控应用程序不时会因为没有明显原因而死亡。 似乎“mshtml.HTMLDocument”资源不可用。 其他人经历过类似的事吗? 提前致谢。

错误信息:

14.04.2011 18:26:37 -> Test 1.2 (Subscriber type requests), error: Unable to cast COM object of type 'System.__ComObject' to interface type 'mshtml.HTMLDocument'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{3050F55F-98B5-11CF-BB82-00AA00BDCE0B}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). 

错误堆栈跟踪:

 14.04.2011 18:26:37 -> Test 1.2 (Subscriber type requests), trace: at WatiN.Core.Native.InternetExplorer.IEWaitForComplete.WaitForFramesToComplete(IHTMLDocument2 maindocument) at WatiN.Core.Native.InternetExplorer.IEWaitForComplete.WaitForFramesToComplete(IHTMLDocument2 maindocument) at WatiN.Core.Native.InternetExplorer.IEWaitForComplete.WaitForCompleteOrTimeout() at WatiN.Core.WaitForCompleteBase.DoWait() at WatiN.Core.IE.WaitForComplete(Int32 waitForCompleteTimeOut) at WatiN.Core.Browser.GoTo(Uri url) at WatiN.Core.Browser.GoTo(String url) at WebMonitor.Tests.Execute() ... 

谢谢你的报道。 我已经重新尝试了演员。 此exception可能是由时间引起的。 希望重试能解决它。 将成为下一个版本的一部分或从SourceForge获取最新代码。