Dwlwin COM Object Development

IoT Modules Development tools
1

When I use dwlwin.exe as COM object server for the development of simultaneous download on multi-port serial interfaces. firstly, I have registered the server(dwlwin.exe /regserver). but when I start download, it return error code=5 (missing download file ). the bin and e2p files are included.
the source code is as below:

pDWLWin->setDownloadOptions(
	6,
	115200,
	"E:\\work\\M100EVO\\Q24",
	"pro-dwl.wpb|WIPSoft_v311.wpb|",
	"q24pl001.e2p|w.e2p|",
	"",
	1,
	1,
	1,
	0,
	0,
	0,
	4,
	0,
	"");
pDWLWin->start(6);
Sleep(500);

pDWLWin->getProgress(6);

bool bConnected = false;

while(!pDWLWin->isDownloadOver(6))
{
	::Sleep(500);
	if(!bConnected && pDWLWin->isBootOk(6))
	{
		printf("DWLWin is connected\n");
		bConnected = true;
	}
}

int nExitCode = pDWLWin->getErrorCode(6);
_bstr_t bsMessage = pDWLWin->translateErrCode(nExitCode);
printf("Exit message = %s (code %d)\n",(LPCTSTR)bsMessage, nExitCode);