<stderr>: SystemId Unknown; Line #57; Column #31; Failed calling setMethod method

Hi,

I'm developing an web application (using Java) on the Google App Engine...

The thing is the my logs are full of this weird stderr message

<stderr>: SystemId Unknown; Line #57; Column #31; Failed calling setMethod
method

I did googled a lot and asked this question on many places, but no one knew
the reason why

and recently I bumped into several posts with similar stderr that was caused
by Xalan , the stderr were of the same structure :

<stderr>: SystemId Unknown; Line #XXX ; Column #YYY; Failed calling
setMethod method

So I was wondering... any chance that the stderr message that I'm getting is
cause by Xalan?

I'm not making explicit use of Xalan, by I have added the following files o
the lib folder (in order to run JSF2 application on GAE)

   - serializer.jar
   - xalan.jar
   - xercesImpl.jar
   - xml-apis.jar
   - xsltc.jar


Help will be much appreciated...


Regards,

Daniel.