I seem to have everything necessary to print barcodes however they do not print. My confirmations appear with [barcode_missing] in the place where the barcode should appear. I have checked the folder permissions and all seems good. Barcode image is created in the image folder. I'm using SEF settings on the site, so mayube there is an adjustment needed there.
In followup, in case it comes up from another user, if a confirmation form is received and the user has images turned off in the email client settings the confirmation will show the link to the image file, not the barcode. We had multiple users asking about this and had no idea what the problem was. I'm not sure if this poses any security issues but it does show the file location on the confirmation. And calling the link from a browser it does appear online.