Posted 10 September 2017, 11:48 am ESTI'm using the report designer and incorporating a QR barcode into a report, replacing the 39 barcode. When view the report in the report viewer in a asp.net page the QR barcode renders an error stating "can not load assembly c1.win.c1barcode". However, the 39 barcode works fine in the viewer but the QR barcode does not. Both the viewer and the designer are ver 4. My question is how to get the QR barcode to work in the report viewer using a web page or is it just a win form control??