can't create XalanDocument output with XalanTransformer.transform()

[Michael Schultz]

I'm trying to use the XalanTransformer::transformer() method to
transform a XalanDocument object that I've created programmatically.

I have no problem creating the document and adding elements to it using
the SAX API, but when I try to transform it, I get a XalanDOMException
with code = NO_MODIFICATION_ALLOWED_ERR

Is it impossible to create a XalanDocument with
XalanTransformer::transformer()?

This is what I've done:

***********************************************************
XMLPlatformUtils::Initialize();
XalanTransformer::initialize();
XalanTransformer theXalanTransformer;

XalanDocumentBuilder* const  theInputBuilder  =
theXalanTransformer.createDocumentBuilder();
XalanDocumentBuilder* const  theOutputBuilder =
theXalanTransformer.createDocumentBuilder();

...
...
//get the SAX2 ContentHandler from the builder and
//build the input document with SAX
...
...

theResult = theXalanTransformer.transform( *theInputBuilder, "foo.xsl",
theOutputBuilder->getDocument());
************************************************************

Thanks for any help...