I'm building an app designed for mobile devices that includes the BarcodeScanner control, which uses the device's camera to scan barcodes and returns the result to the OnScan event in the app. The event is supposed to be triggered when a barcode is successfully scanned. I have inserted code into the OnScan event for the control, and up until recently it has been working fine, but now it seems the code does not run in the published version on my Android phone. Strangely it does work when I play the app from the designer with the Monitor running. Does anyone know why it might not run the code in the event trigger on the mobile device? If it's a problem with the code I've added to the OnScan event, how do I debug it on the mobile device when it works ok in the designer?