Thank you for reaching out, and sorry about the delay in response.
As mentioned above, you are trying to generate the barcode for Canadian visa documents.
Canadian visa and immigration forms generate a barcode only after validation is successful. The barcode will not appear automatically while filling out the form.
Ensure that you are using the desktop application to open and fill the form, not the browser version.
Make sure that the required fields are complete and valid.
JavaScript is disabled in the PDF application.
Download the latest original from the website.
Type information directly into the form fields. Avoid copy‑pasting from Word or other applications, if possible (can break validation)
Ensure all mandatory fields are completed.
Scroll to the end of the form, and click Validate. If all data is correct, barcode pages will be generated automatically at the end.
If you are referring to somehting else, please share more information about the issue. Share the screenshot of the error message, if any.