No ZPL barcode command on this label. If the barcode is inside the image, Labelproof cannot check it — and an image barcode is fixed at the resolution it was generated for, so it will not survive a change of printhead.
Draw the barcode with a ^B command so the printer renders it at native resolution.
^XA^FO50,50^XGR:BARCODE.GRF,1,1^FS^XZ
The label contains at least one ^GF or ^XG field above a size threshold and no ^B* barcode command anywhere.
Neither ^PW nor ^LL is set. Both fall back to a value stored in the individual printer, not to a value in the spec — so the same ZPL prints differently on two printers of the same model.
Set ^PW and ^LL explicitly in every format.
This label depends on R:BARCODE.GRF already being stored on the printer. On a printer that does not have it — a new unit, a second site, or after a memory wipe — the label prints without it.
Download the object in the stream, or document it as a printer provisioning step.
No ZPL barcode command on this label. If the barcode is inside the image, Labelproof cannot check it — and an image barcode is fixed at the resolution it was generated for, so it will not survive a change of printhead.
Draw the barcode with a ^B command so the printer renders it at native resolution.
Turns 'we found nothing' — the worst possible first experience — into a specific, teachable finding, and flags a genuinely fragile pattern.
Turns 'we found nothing' — the worst possible first experience — into a specific, teachable finding, and flags a genuinely fragile pattern.