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POFirst chance exception in MSXML6
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copied!<p>I'm validating XML files against XSD schemas as they do in the MSXML documentation <a href="http://msdn.microsoft.com/en-us/library/ms762787%28v=vs.85%29.aspx" rel="nofollow">example</a>. I have the following code:</p> <pre><code>XMLSchemaValidation updateInfoSchema; updateInfoSchema.DoInitialization(L"schema.xsd"); HRESULT hr = CoInitialize(NULL); if(SUCCEEDED(hr)) { try { _bstr_t bstrOutput = updateInfoSchema.validateFile(L"valid.xml"); } catch(_com_error &e) { updateInfoSchema.dump_com_error(e); } CoUninitialize(); } // Macro that calls a COM method returning HRESULT value. #define CHK_HR(stmt) do { hr=(stmt); if (FAILED(hr)) goto CleanUp; } while(0) _bstr_t XMLSchemaValidation::validateFile(_bstr_t bstrFile) { // Declare and initialize variables MSXML2::IXMLDOMSchemaCollectionPtr pXS; MSXML2::IXMLDOMDocument2Ptr pXD; MSXML2::IXMLDOMParseErrorPtr pErr; _bstr_t bstrResult = L""; HRESULT hr = S_OK; // Create a schema cache and add xsd schema to it. CHK_HR(pXS.CreateInstance(__uuidof(MSXML2::XMLSchemaCache60), NULL, CLSCTX_INPROC_SERVER)); CHK_HR(pXS->add(L"", (LPCSTR)(SchemaFileName.GetString()))); // Create a DOMDocument and set its properties. CHK_HR(pXD.CreateInstance(__uuidof(MSXML2::DOMDocument60), NULL, CLSCTX_INPROC_SERVER)); // Assign the schema cache to the DOMDocument's schemas collection. pXD->schemas = pXS.GetInterfacePtr(); // Load bstrFile into the DOM document. pXD->async = VARIANT_FALSE; pXD->validateOnParse = VARIANT_TRUE; pXD->resolveExternals = VARIANT_TRUE; if(pXD->load(bstrFile) != VARIANT_TRUE) { pErr = pXD->parseError; bstrResult = _bstr_t(L"Validation failed on ") + bstrFile + _bstr_t(L"\n=====================") + _bstr_t(L"\nReason: ") + _bstr_t(pErr->Getreason()) + _bstr_t(L"\nSource: ") + _bstr_t(pErr->GetsrcText()) + _bstr_t(L"\nLine: ") + _bstr_t(pErr->Getline()) + _bstr_t(L"\n"); } else { bstrResult = _bstr_t(L"Validation succeeded for ") + bstrFile + _bstr_t(L"\n======================\n") + _bstr_t(pXD->xml) + _bstr_t(L"\n"); } CleanUp: return bstrResult; } </code></pre> <p><code>XMLSchemaValidation::DoInitialization(CString XSDFileName)</code> gets the XSD schema file name into the CString <code>XMLSchemaValidation::SchemaFileName</code>.</p> <p>The code then follows the one in the MSXML example, but I get</p> <pre><code>First-chance exception at 0x76f9c41f (KernelBase.dll) in CSW.exe: Microsoft C++ exception: _com_error at memory location 0x04a7f014.. </code></pre> <p>when code reaches <code>CHK_HR(pXS->add(L"", (LPCSTR)(SchemaFileName.GetString())));</code>. <code>hr</code> has -2146697210.</p> <p>Can anyone tell me why this happens?</p>

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