# Ignition OPC UA to Cognex not able to write

**URL:** <https://forum.inductiveautomation.com/t/ignition-opc-ua-to-cognex-not-able-to-write/104865>\
**Category:** Ignition\
**Tags:** ignition81, vision\
**Created:** [April 8, 2025, 7:59pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-to-cognex-not-able-to-write/104865 "2025-04-08T19:59:33Z")\
**Posts on this page:** 1\
**Showing post:** 16

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**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:** [April 15, 2025, 7:08pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-to-cognex-not-able-to-write/104865/16 "2025-04-15T19:08:19Z")

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Yeah, same error has over here basically: [Error calling OPC UA method - #2 by Kevin.Herron](https://forum.inductiveautomation.com/t/error-calling-opc-ua-method/83234/2)

This server has a buggy OPC UA implementation. I reworked our OPC UA method call logic to avoid triggering that path in servers that use this implementation and it got released with Ignition 8.1.43.

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