Hello,

I’m working on lot labels in Odoo v18 Enterprise.

According to the documentation and tutorials, Odoo should be able to generate GS1 DataMatrix codes (with proper AI application identifiers and FNC1 separator).

However, when I print the labels pdf the barcode that gets generated is only a plain DataMatrix not a GS1 DataMatrix.

Example : 019912345678901610C002ARCL251002

• The data is concatenated correctly ((01) product + (10) Lot),  
  
• But the output barcode still does not contain the FNC1 separator and scanners read it as a simple DataMatrix instead of GS1 DataMatrix.

My question:

• Is this expected behavior in Odoo 18 (that the widget ECC200DataMatrix only generates DataMatrix, not GS1 DataMatrix)?
• Or am I missing a step in the GS1 nomenclature configuration to make Odoo automatically insert the FNC1 and encode it as a proper GS1 DataMatrix?