ZPL4005 — GS1 AI value has the wrong length

Some GS1 Application Identifiers have a fixed number of digits: 00 needs 18, 01 and 02 need 14, the date AIs 11 to 17 need 6 (YYMMDD), 20 needs 2 and 410 to 415 need 13. A value with fewer or more characters, or with non-digits, shifts every AI after it, so the scanner splits the data in the wrong places.

Label that triggers it

^XA^FO50,50^BY2^BCN,100,Y,N,N,D^FD(01)0950110153000^FS^XZ

Finding: ZPL4005 · line 1:32 — GS1 AI (01) needs 14 digits; the value given is 13 characters

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How to fix it

Pad GTINs to 14 digits with leading zeros and write dates as YYMMDD. Variable-length AIs such as 10 (batch) and 21 (serial) are not checked.

Corrected label

^XA^FO50,50^BY2^BCN,100,Y,N,N,D^FD(01)09501101530003^FS^XZ

Open the corrected label in the editor

Commands involved

^BC

Related rules

ZPL4001 Barcode without data · ZPL4002 EAN-13 data is not 12–13 digits · ZPL4003 GS1 data without GS1 mode (no FNC1) · ZPL4004 GS1 check digit is wrong · ZPL4006 GS1 check digit set by the printer

In CI

npx labelixa validate "labels/**/*.zpl" lints your files and prints this page's address next to each finding. /docs/cli

Lint your ZPL now