# Error Log ReadStructuredTagsRequest, OPC Connection is good, Tags are bad

**URL:** <https://forum.inductiveautomation.com/t/error-log-readstructuredtagsrequest-opc-connection-is-good-tags-are-bad/85238>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [February 5, 2024, 4:14pm UTC](https://forum.inductiveautomation.com/t/error-log-readstructuredtagsrequest-opc-connection-is-good-tags-are-bad/85238 "2024-02-05T16:14:51Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Ahmed\_Cetiner](https://avatars.discourse-cdn.com/v4/letter/a/b3f665/32.png) [@Ahmed\_Cetiner](https://forum.inductiveautomation.com/u/Ahmed_Cetiner)\
**Post date:** [February 5, 2024, 4:14pm UTC](https://forum.inductiveautomation.com/t/error-log-readstructuredtagsrequest-opc-connection-is-good-tags-are-bad/85238/1 "2024-02-05T16:14:51Z")

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Hello all,

I read similar posts to this subject but I couldn't find the exact issue.  
I have a **8.1.32** version Ignition.  
I am connecting to a ControlLogix PLC with Allen-Bradley Logix Driver.  
PLC shows connected under "OPC UA/Device Connections", however certain UDT tags to this PLC fails to be read by Ignition OPC UA.  
When I use "OPC Quick Client", these UDTs aren't visible, other tags however can be read/write. However, these UDTs are visible in "Designer/Browse Devices"  
but their value shows "Bad".

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/2/8/282f134a3e8cc44eeafc177b97b253597941c03b.png)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/a/8aa516149b5eb593ff554e180879998fc3030fa0.png)

Not sure what to do in this situation, already power cycled the PLC and still didn't fix the issue. Thanks for your help in advance!

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<div class="post-metadata">

**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:** [February 5, 2024, 4:22pm UTC](https://forum.inductiveautomation.com/t/error-log-readstructuredtagsrequest-opc-connection-is-good-tags-are-bad/85238/2 "2024-02-05T16:22:05Z")

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Do you see any messages like this in the logs?

> [@Some Tags From PLC not Showing Up In Ignition](https://forum.inductiveautomation.com/t/some-tags-from-plc-not-showing-up-in-ignition/48875/1):
>
> Error browsing template instanceId=757
> 
> com.digitalpetri.enip.cip.CipResponseException: status=0x05 [path destination unknown] , additional=[0x0000]