Hi,
Sorry for the inconvenience. We are looking into this issue.
As a workaround, try to run the code after commenting/removing the line where you set the Symbology. It should be able to detect all 3 barcodes this way.
// barcodeReader.SymbologyType = Symbology.Code39Extended;
Best Regards,
Saqib Razzaq
Support Developer
Aspose Guangzhou Team