Получение coledispatchexception в ячейке памяти 0x00b3d59c.

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Я получаю исключение в открытом методе.

lpDisp = xlBooks.Open(a_sFileName,covOptional,covOptional,
    covOptional,covOptional,covOptional,covOptional,
    covOptional,covOptional,covOptional,covOptional,
    covOptional,covOptional,covOptional,covOptional);

LPDISPATCH Workbooks::Open(LPCTSTR Filename, const VARIANT& UpdateLinks, const VARIANT& ReadOnly, const VARIANT& Format, const VARIANT& Password, const VARIANT& WriteResPassword, const VARIANT& IgnoreReadOnlyRecommended, const VARIANT& Origin, 
		const VARIANT& Delimiter, const VARIANT& Editable, const VARIANT& Notify, const VARIANT& Converter, const VARIANT& AddToMru, const VARIANT& Local, const VARIANT& CorruptLoad)
{
	LPDISPATCH result;
	static BYTE parms[] =
		VTS_BSTR VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT VTS_VARIANT;
	InvokeHelper(0x783, DISPATCH_METHOD, VT_DISPATCH, (void*)&result, parms,
		Filename, &UpdateLinks, &ReadOnly, &Format, &Password, &WriteResPassword, &IgnoreReadOnlyRecommended, &Origin, &Delimiter, &Editable, &Notify, &Converter, &AddToMru, &Local, &CorruptLoad);
	return result;
}

Что я уже пробовал:

Кажется

excel interop

вопрос.

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