# Created an OPC UDT but most elements show up as "Error\_Configuration" (Node ID does not exist)

**URL:** <https://forum.inductiveautomation.com/t/created-an-opc-udt-but-most-elements-show-up-as-error-configuration-node-id-does-not-exist/107795>\
**Category:** Ignition\
**Tags:** vision, ignition81\
**Created:** [June 25, 2025, 7:11pm UTC](https://forum.inductiveautomation.com/t/created-an-opc-udt-but-most-elements-show-up-as-error-configuration-node-id-does-not-exist/107795 "2025-06-25T19:11:13Z")\
**Posts on this page:** 1\
**Showing post:** 13

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [June 26, 2025, 12:07am UTC](https://forum.inductiveautomation.com/t/created-an-opc-udt-but-most-elements-show-up-as-error-configuration-node-id-does-not-exist/107795/13 "2025-06-26T00:07:50Z")

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> [@michael.flagler](#):
>
> but only makes it so that communications can be optimized to the tags in the PLC

But _only_ if you use Phil's [EtherNet IP driver module](https://forum.inductiveautomation.com/t/automation-professionals-ethernet-ip-communication-suite-v2/68190). IA's Logix driver will not optimise this regardless of AOI parameter external access settings, as these methods are not publicly documented. Phil spent the time reverse-engineering the protocol to allow this

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