# Reading a udt palced in a 3d array **URL:** \ **Category:** Ignition\ **Tags:** ignition81\ **Created:** [January 15, 2026, 10:41am UTC](https://forum.inductiveautomation.com/t/reading-a-udt-palced-in-a-3d-array/113312 "2026-01-15T10:41:56Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Michael\_Johannsen](https://avatars.discourse-cdn.com/v4/letter/m/3ab097/32.png) [@Michael\_Johannsen](https://forum.inductiveautomation.com/u/Michael_Johannsen)\ **Post date:** [January 15, 2026, 10:41am UTC](https://forum.inductiveautomation.com/t/reading-a-udt-palced-in-a-3d-array/113312/1 "2026-01-15T10:41:56Z")
Hi. I would like read read this UDT from one one your mashines, and all the other udt’s It i placed in a 3 dimensional array. An can read each tag i the array, but I would like to read the struct from the PLC as an Document or an onter data type But is says error decoding Does any knows I’m dooing wrong? ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/0/5086ecc0241d89f4c7999890dc035a1341074196.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/0/4/049226d2ddf869b4a5a0ef3477a3d1cd0d8b1471.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/a/4/a4a6a37de4ee588d8c6454d8eb2854ac9f1c37ef.png) ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/d/e/de19aa2d43c585b451a58b65366ec8737750e5e3.png) ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [January 15, 2026, 12:40pm UTC](https://forum.inductiveautomation.com/t/reading-a-udt-palced-in-a-3d-array/113312/2 "2026-01-15T12:40:55Z")
This might be possible in Ignition 8.3, but I don't think it's supported in 8.1 or prior. ---
**Author:** ![Michael\_Johannsen](https://avatars.discourse-cdn.com/v4/letter/m/3ab097/32.png) [@Michael\_Johannsen](https://forum.inductiveautomation.com/u/Michael_Johannsen)\ **Post date:** [January 15, 2026, 1:14pm UTC](https://forum.inductiveautomation.com/t/reading-a-udt-palced-in-a-3d-array/113312/3 "2026-01-15T13:14:04Z")
😢