pages_per_side is not working

[CSCJ]

Hi,

I have tried pages per side as below to Canon printer that supports N-Up:

{

  "print": {

    "vendor_ticket_item": [],

    "pages_per_side": {

      "layout": "LEFT_TO_RIGHT_TOP_TO_BOTTOM",

      "pages_per_side": 2

    },

    "duplex": { "type": "LONG_EDGE" },

    "collate": { "collate": true },

    "copies": { "copies": 1 }

  },

  "version": "1.0"

}

But it has no effect.

Any idea? why?

Thanks