Hi there,

The following is code and explanation of steps I'm performing leading
upto a transformation. However, my transformation fails and returns an
E_FAIL. Please help!

1. I create an xml and xsl doc and template as follows:
MSXML2::IXMLDOMDocumentPtr  m_xsldoc;
IXSLTemplatePtr	m_pTemplate;
IXSLProcessorPtr     m_pProcessor;

CoInitialize(NULL);
m_xmldoc.CreateInstance(MSXML2::CLSID_DOMDocument40);
m_xsldoc.CreateInstance(CLSID_FreeThreadedDOMDocument40);
m_pTemplate.CreateInstance(CLSID_XSLTemplate40);

2. Load the xml and xsl:
m_xmldoc->load(v);
m_xsldoc->load(_bstr_t(xsl));

3. Load the template and create a processor: (these execute
successfully, as I check the HRESULT returned)
m_pTemplate->putref_stylesheet(m_xsldoc);
m_pProcessor = m_pTemplate->createProcessor();

4. Perform a couple of addParameters:
m_pProcessor->addParameter(_bstr_t(paramName),_variant_t(paramVal),
_bstr_t(""));

5. Give input xml (again, this is successful)
m_pProcessor->put_input(_variant_t((IUnknown*)xml.Interface()));

6. Create output and call a wrapper transform function, that takes in
this output, as follows:
IUnknown* docOutput;
m_xsldoc.Transform(docOutput); //of the form Transform(IUnknown*
&outDoc)

Inside Transform wrapper:
VERIFY(SUCCEEDED(CoCreateInstance( CLSID_DOMDocument40, NULL,
CLSCTX_INPROC_SERVER, IID_IUnknown,
reinterpret_cast<LPVOID*>(&outDoc))));
m_pProcessor->put_output(_variant_t(outDoc));
m_pProcessor->transform();
return TRUE;

This is where the problem happens. I don't go to return true, except
catch an exception which is "E_FAIL".

What am I doing wrong? I really apprecite your help.

Thank you.