Web Demos

BARCODE READER SDK DEMO

Explore the flexibe barcode reading settings to optimize for your specific usage scenario.

WEB TWAIN SDK DEMO

Try the most popular web scanner features: scan images, import local images and PDF files, edit, save to local, upload to database, and etc.

BARCODE READER JAVASCRIPT DEMO

Transform any camera-equipped devices into real-time, browser-based barcode and QR code scanners.

MRZ SCANNER WEB DEMO

Detects the machine-readable zone of a passport, scans the text, and parses into human-readable data.

APP STORE DEMOS

BARCODE READER SDK FOR IOS

BARCODE READER SDK FOR ANDROID

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Table of contents

Error Troubleshooting

Source is connected to the maximum supported number of applications

Symptom

When you try to acquire images, you may get this error.

Cause

The problem may occur when the source is not disabled completely after a transfer ends or is used by other applications.

Resolution

  • Check whether another application is using the source. If yes, close it and try again.
  • Set IfDisableSourceAfterAcquire to true and use CloseSource() to make sure that the source is closed after a scanning session.
function btnScan_onclick() {
  DWObject.RegisterEvent("OnPostAllTransfers", function () {
    DWObject.CloseSource();
  });
  DWObject.SelectSource();
  DWObject.CloseSource(); //close source before open
  DWObject.OpenSource();
  DWObject.IfDisableSourceAfterAcquire = true; //close the scanner UI after acquiring
  DWObject.AcquireImage();
}
  • Reboot your device.

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