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#1 Posted : Wednesday, July 22, 2015 1:26:17 AM(UTC)


Groups: Registered
Posts: 1

Im trying de create an application using Leadtools twain fro scanning documents.

The application works fine with some scanners but i get an error with FUJITSU fj-6130 scanner

"2015-07-22 11:57:33.5982 ERROR Leadtools.RasterException: Invalid parameter passed
à Leadtools.Twain.TwainCapability.get_OneValueCapability()
à Automatic.Scan.UI.Custom.ScanForm._miFileAcquire_Click(Object sender, EventArgs e)
à System.Windows.Forms.Control.OnClick(EventArgs e)
à System.Windows.Forms.Button.OnClick(EventArgs e)
à System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
à System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
à System.Windows.Forms.Control.WndProc(Message& m)
à System.Windows.Forms.ButtonBase.WndProc(Message& m)
à System.Windows.Forms.Button.WndProc(Message& m)
à System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
à System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
à System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)"

this is the code where the exception is detected :

" try
config.ConfigType = ConfigFileType.WindowsService;
_twainSession.AcquirePage += new EventHandler(_twain_AcquirePage);

//INST: Scan des images
//INST : Vérification si le scanner est branché ou non
isOnline = new TwainCapability();
isOnline = _twainSession.GetCapability(TwainCapabilityType.DeviceOnline, TwainGetCapabilityMode.GetValues);
_twainSession.EnableGetDeviceEvent = true;

//INST: Verfier si le scanner contient du papier ou non
feederLoaded = new TwainCapability();
feederLoaded = _twainSession.GetCapability(TwainCapabilityType.FeederLoaded, TwainGetCapabilityMode.GetValues);

online = (bool)isOnline.OneValueCapability.Value;
loaded = (bool)feederLoaded.OneValueCapability.Value;

if (online)
btnRestart.Enabled = true;
if (loaded)
_sbMain.Text = "Opération terminée.";

MessageBox.Show(this, "Il n'y a pas de papier dans le scanner!");
_sbMain.Text = "Erreur d'acquisition!";
MessageBox.Show(this, "Le scanner n'est pas connecté!");
_sbMain.Text = "Erreur d'acquisition!";
//INST: Retrait de l'evenement acquire
_twainSession.AcquirePage -= new EventHandler(_twain_AcquirePage);

MessageBox.Show("Le nombre pages scannées est: " + _saveFilesCount.ToString());

Thread ProcessScannedThread = new Thread(() => SplitImages(tempFileNameTiff));
ProcessScannedThread.IsBackground = true;

catch (TwainException ex)
throw ex;
} "

Should i chage the driver of the scanner or change same code ?

Please HELP me


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#2 Posted : Wednesday, July 22, 2015 6:28:52 AM(UTC)


Groups: Registered, Tech Support
Posts: 179

I sent you a reply regarding this issue in Ticket number 2015072210000239 . If you have questions or comments, please reply to that email.
Mohamed Abedallah
Developer Support Engineer
LEAD Technologies, Inc.

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