I have the following Problem. When I try to erase a CDRW disc with using the nero API I always get error code 1 from NeroEraseDisc(...) returned.

This only ahappens if i run the programm without debugging. If I debug the code (set a breakpoint on the top and step through) the erase process is successful. I have the same problem with when I write a disc.

I use Nero API v7.0.5.6

Has anyone an idea???

My code looks like this:

NERO_SCSI_DEVICE_INFO* nsdiDevice = (NERO_SCSI_DEVICE_INFO*)mcbxDevices.GetItemDataPtr(i);
ndhDeviceHandle = NeroOpenDevice(nsdiDevice);

if (!ndhDeviceHandle) {
AppendString(_T("Device could not be opened: ") + (CString)nsdiDevice->nsdiDeviceName);
}
else {
if (_tcscmp(nsdiDevice->nsdiDeviceName, _T("Image Recorder"))) {

NERO_CD_INFO *pInfo = NeroGetCDInfo (ndhDeviceHandle,0);
if (pInfo == NULL) {
AppendString (_T("ERROR: can't get CD-Info"));
NeroCloseDevice(ndhDeviceHandle);
return;
}
NeroFreeMem(pInfo);
}

NEROAPI_CDRW_ERASE_MODE mode = NEROAPI_ERASE_QUICK; // Default is quickly
int time;

if(m_eEraseMode == eModeComplete)
mode=NEROAPI_ERASE_ENTIRE;
time=NeroGetCDRWErasingTime(ndhDeviceHandle, mode);
if (time==-1)
AppendString(_T("No CD inserted"));
else if (time==-2)
AppendString(_T("This CD recorder doesn't support CDRW"));
else if (time==-3)
AppendString(_T("This media is not rewritable"));
CString strTemp;
strTemp.Format(_T("Erasing CDRW. This will take %d seconds."), time);
AppendString(strTemp);

//get media type
NERO_MEDIA_TYPE mediaType = NeroGetCurrentMediumType(ndhDeviceHandle);
//get speed info
NERO_SPEED_INFOS *speed = NeroGetAvailableSpeeds (ndhDeviceHandle, ACCESSTYPE_WRITE, mediaType, NULL);
DWORD uiSpeedInKb = 150; //150kB == 1x speed
if (speed != NULL)
uiSpeedInKb = speed->nsiSupportedSpeedsKBs[speed->nsiNumSupportedSpeeds-1]; //get maximum speed

int err = NeroEraseDisc(ndhDeviceHandle, mode, NEDF_DISABLE_EJECT /*don't eject disc*/, uiSpeedInKb );

NeroCloseDevice(ndhDeviceHandle);
NeroFreeMem(speed);
}

Now I now the Problem:
NeroOpenDevice(...); returns not NULL but needs some time to get ready.
So, if I insert a Sleep(5000); after NeroOpenDevice it works.

Has anybody a better solution?

Thanks wagenwi