My add-in doesn't often (not always) work in SW2013 64bit,

because the function "ISldWorks::INewDocument2" throws exception.

But the add-in always works well in SW2013 32bit and in SW2012 or earlier version.

Does anyone know such a situation.

Incidentally,source code is as follows

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CoInitialize(NULL);

try{

    CComPtr swApp;

    USES_CONVERSION;

    HRESULT hres = swApp.CoCreateInstance(A2OLE("SldWorks.Application"), NULL, CLSCTX_LOCAL_SERVER);

    if( hres != S_OK){

        return;

    }

    CComBSTR wTemplateName;

    swApp->GetUserPreferenceStringValue ( swDefaultTemplateAssembly, &wTemplateName );

    // I confirmed that I can get a correct template name.

    IModelDoc2* pModelDoc = NULL;

    swApp->INewDocument2( wTemplateName, 0, 0, 0,&pModelDoc);

    // access violation exception is thwrown in this function,

    // and my add-in sometimes crashes...

    swApp->ExitApp();

    swApp = NULL;

}catch(...){}

CoUninitialize();

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Regards