When trying to incorporate barcodes into a form using Designer, I always seem to reach a point where the calculate() script quits getting called and the barcode quits updating. It usually seems to happen once I put the barcode into a subform with data bound items.
I've also seen behavior in the same situation where the barcode control simply renders as a white square.
I did a litte more testing on this and it appears to be related to having an XSD-based DataConnection bound to the fields. If I delete my data connection, the barcode seems to update.
If you use automatic scripting and apply the Barcode value to the top-level subform so that the Barcode itself does not actually belong to the lower-level subforms the calculate does not get performed because the Barcode is one level too high and "thinks" that it is not associated to any data.
Try pulling your Barcode into the same Hierarchy level of the objects that you want to include in your Barcode.
If you are using the XML encoding make sure each of your subform levels and content subforms are named and are not (unnamed) subforms. As always, feel free to send the form to me to check out (lsutton@adobe.com).
