Very strange, but repeatable issue I've run into. I'm using the barbecue Java barcode generator library to generate code128 compliant barcodes which are then handed to cfimage writeToBrowser to finally end up with printable packing/mailing labels. When rendered to screen, everything works perfectly, but as soon as I wrap it in a cfdocument tag, so that we can generate as a pdf for printing on a label printer, I'm ending up with the wrong image on the wrong label in a few cases. It's always the same records that end up reusing an image from an earlier record (and always the same earlier record). I can check in the ColdFusion8\tmpCache\CFFileServlet\_cf_image folder and see that all the correct images were created by the cfimage tag, but for whatever reason, some of the images don't make it into the pdf, but are replaced by a different barcode from an earlier record. I can't see any commonality between the two records and if I intentionally remove the earlier record from the query, the proper barcode shows up.
So, any ideas about where to go from here? Anybody know anything about how cfdocument pulls in images and if there is any kind of caching or prechecking of the images before rendering. I actually checked to make sure the two files didn't have the same MD5 sum to see if there was something happening there where CF thinks it's the same image. They were not the same.
I've tried this on two CF 8.01 boxes with the same result. Always the same records, same images, same problem, even if I limit the query to only the two problem records. I'm totally stumped. Anybody?