Barcodes in a dynamic form

Hi everybody

I have a form in which I can add new items using instanceManager. I want to capture the data from each item i separate barcodes, and here comes the problem. I can make the barcode capture data from the first item in the form, but when I add new items when I fill out the form, the barcodes all refers to item no. one.

How can I make each new barcode refer to the right item?

The objects for item information including the barcode is placed in a subform.

I hope someone can help.

K