The bar width is outside the GS1-128 range (0.495 mm to 0.940 mm, 0.495 mm target). At 203 dpi that means ^BY 4 or greater.
Raise ^BY to at least 4 at 203 dpi, or 6 at 300 dpi.
^XA^BY2^FO50,50^BCN,254,Y,N,N,D^FD>;>8010001234567890^FS^XZ
Profile is GS1 and the X-dimension implied by ^BY falls outside 0.495 mm – 0.940 mm.
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.
The bar width is outside the GS1-128 range (0.495 mm to 0.940 mm, 0.495 mm target). At 203 dpi that means ^BY 4 or greater.
Raise ^BY to at least 4 at 203 dpi, or 6 at 300 dpi.
At 203 dpi ^BY2 — the power-up default — and ^BY3 both fail GS1.
Subset C encodes digits in pairs. This payload has an odd number of digits, so the last one is dropped — the barcode prints, scans cleanly, and returns one digit short of the data underneath it.
Pad to an even digit count, switch to Subset B (>:), or let ZPL auto-select the subset.
Cloud Retailer help desk, "Zebra Label Missing Last Digit and/or Not Scanning All Digits in Barcode": odd-length codes such as EAN-13 lose the final digit — "subset C cannot process single digits, it MUST be in a pair." A customer-reported production failure, documented by a vendor.
At 203 dpi ^BY2 — the power-up default — and ^BY3 both fail GS1.