I have noticed these err messages as well, when trying to test a GWT 
application under HTMLUnit.

On Wednesday, November 9, 2011 11:53:36 AM UTC-8, MH wrote:
>
> I'm trying to use htmlunit as recommended to return ? 
> _escaped_fragment_ queries by Google's crawler 
>
> I ask htmlunit to load my html page which contains a GWT program and 
> call waitForBackgroundJavaScript(). 
>
> However the page then returned  by .asXml() has not got any GWT 
> components. The only processing that has occurred is the insertion of 
> the following: 
>
> <script defer="defer"> 
> //<![CDATA[ 
> <my gwt module name>.onInjectionDone('<my gwt module name>') 
> //]]> 
>     </script> 
>
> I don't know if it's relevant but htmlunit output these cryptic error 
> messages: 
>
> com.gargoylesoftware.htmlunit.javascript.StrictErrorReporter 
> runtimeError 
> SEVERE: runtimeError: message=[Automation server can't create object 
> for 'ChromeTab.ChromeFrame'.] sourceName=[http://127.0.0.1:8888/ 
> com.procyor.Procyor/com.procyor.Procyor.nocache.js] line=[16] 
> lineSource=[null] lineOffset=[0] 
>
> com.gargoylesoftware.htmlunit.html.SimpleHTMLParserListener error 
> SEVERE: Empty document. (http://gaeHack_about/blank 1:6) 
>
> Any help appreciated!

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