Troubleshooting - Error: [xxx] No license found

Problem

When moving from a trial license to a production license, you may encounter the error [xxx] No license found if your enabled barcode formats don’t match the formats supported by your license. This occurs because the SDK validates enabled formats against your license’s capabilities.

Solution

Explicitly enable only the barcode formats covered by your license in your code configuration.

Step-by-Step Guide

Step 1. Check Your License Coverage

Confirm which barcode formats your license supports (e.g., QR Code + 1D barcodes).

Step 2. Configure Barcode Formats

Update your code to explicitly enable only the licensed formats. Here are examples for enabling Multiple Formats(Use bitwise OR (|) to combine formats):

• Javascript
• Objective-C
• Swift
• Android
• Python
• C++
• C#

let settings = await router.getSimplifiedSettings("ReadSingleBarcode");
// Enable QR Code and OneD
settings.barcodeSettings.barcodeFormatIds = 
  Dynamsoft.DBR.EnumBarcodeFormat.BF_ONED | Dynamsoft.DBR.EnumBarcodeFormat.BF_QR_CODE;
await router.updateSettings("ReadSingleBarcode", settings);
await router.startCapturing("ReadSingleBarcode");
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/web/programming/javascript/api-reference/enum-barcode-format.html?lang=js

DSBarcodeScannerConfig *config = [[DSBarcodeScannerConfig alloc] init];
config.barcodeFormats = DSBarcodeFormatQRCode | DSBarcodeFormatOned;
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/mobile/programming/objectivec-swift/api-reference/enum/barcode-format.html

let config = BarcodeScannerConfig()
config.barcodeFormats = [.oneD, .qrCode]
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/mobile/programming/objectivec-swift/api-reference/enum/barcode-format.html

try {
   // Obtain current runtime settings. `cvr` is an instance of `CaptureVisionRouter`.
   // Here we use `EnumPresetTemplate.PT_READ_BARCODES` as an example. You can change it to your own template name or the name of other preset template.
   SimplifiedCaptureVisionSettings captureVisionSettings = cvr.getSimplifiedSettings(EnumPresetTemplate.PT_READ_BARCODES);
   captureVisionSettings.barcodeSettings.barcodeFormatIds = EnumBarcodeFormat.BF_QR_CODE | EnumBarcodeFormat.BF_ONED;
   // Update the settings. Remember to specify the same template name you used when getting the settings.
   cvr.updateSettings(EnumPresetTemplate.PT_READ_BARCODES, captureVisionSettings);
} catch (CaptureVisionRouterException e) {
   e.printStackTrace();
}
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/server/programming/java/api-reference/enum-barcode-format.html

cvr_instance = CaptureVisionRouter()
# Obtain current runtime settings of `CCaptureVisionRouter` instance.
err_code, err_str, settings = cvr_instance.get_simplified_settings(EnumPresetTemplate.PT_READ_BARCODES.value)
# Specify the barcode formats by enumeration values.
# Use "|" to enable multiple barcode formats at one time.
settings.barcode_settings.barcode_format_ids = EnumBarcodeFormat.BF_QR_CODE.value | EnumBarcodeFormat.BF_ONED.  value
# Update the settings.
err_code, err_str = cvr_instance.update_settings(EnumPresetTemplate.PT_READ_BARCODES.value, settings)
# View the complete list of supported barcode formats and their corresponding IDs here
# https://www.dynamsoft.com/barcode-reader/docs/server/programming/python/api-reference/enum-barcode-format.html

char szErrorMsg[256] = {0};
// Obtain current runtime settings of `CCaptureVisionRouter` instance.
CCaptureVisionRouter* cvr = new CCaptureVisionRouter;
SimplifiedCaptureVisionSettings settings;
cvr->GetSimplifiedSettings(CPresetTemplate::PT_READ_BARCODES, &settings);
// Specify the barcode formats by enumeration values.
// Use "|" to enable multiple barcode formats at one time.
settings.barcodeSettings.barcodeFormatIds = BF_QR_CODE | BF_ONED;
// Update the settings.
cvr->UpdateSettings(CPresetTemplate::PT_READ_BARCODES, &settings, szErrorMsg, 256);
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/server/programming/cplusplus/api-reference/enum-barcode-format.html?lang=cpp

using (CaptureVisionRouter cvr = new CaptureVisionRouter())
{
   SimplifiedCaptureVisionSettings settings;
   string errorMsg;
   // Obtain current runtime settings of `CCaptureVisionRouter` instance.
   cvr.GetSimplifiedSettings(PresetTemplate.PT_READ_BARCODES, out settings);
   // Specify the barcode formats by enumeration values.
   // Use "|" to enable multiple barcode formats at one time.
   settings.barcodeSettings.barcodeFormatIds = (ulong)(EnumBarcodeFormat.BF_QR_CODE | EnumBarcodeFormat.BF_ONED);
   // Update the settings.
   cvr.UpdateSettings(PresetTemplate.PT_READ_BARCODES, settings, out errorMsg);  
}
// View the complete list of supported barcode formats and their corresponding IDs here
// https://www.dynamsoft.com/barcode-reader/docs/server/programming/dotnet/api-reference/enum-barcode-format.html?product=dcv&lang=dotnet