# Ignition OPC-UA Server - Data Types / Client Troubleshooting

**URL:** <https://forum.inductiveautomation.com/t/ignition-opc-ua-server-data-types-client-troubleshooting/83799>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [January 4, 2024, 4:49pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-server-data-types-client-troubleshooting/83799 "2024-01-04T16:49:30Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Joe\_Bonhage](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/joe_bonhage/32/45543_2.png) [@Joe\_Bonhage](https://forum.inductiveautomation.com/u/Joe_Bonhage)\
**Post date:** [January 4, 2024, 4:49pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-server-data-types-client-troubleshooting/83799/1 "2024-01-04T16:49:30Z")

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Hi all,  
We are in the process having an external OPC-UA client read the OPC-UA value exposed from the tag provider. First we tested the OPC-UA client with Ignition memory tags and had no issues with the client reading values. Once we connected Ignition to the PLC and changed the data type from source memory to OPC, we had read errors on the client. We will try to debug the client side on how it is parsing Ignition OPC-UA tag but is there a way I can see in detail on what changes on the Ignition OPC-UA server when modifying the value source? (or the IG server can show logs on it's replies to a client?)

 ![IG Post](https://us1.discourse-cdn.com/inductiveautomation/original/3X/7/3/7345d3ff3b9e61a8e0b15d55dfba1deebbcc78a2.png)

 ![IG Post 2](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/3/831d99a28c9d82b8ff575343dc4b024b85560b4e.png)

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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:** [January 4, 2024, 4:52pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-server-data-types-client-troubleshooting/83799/2 "2024-01-04T16:52:16Z")

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You could browse to that Node in UaExpert and look to see if any of the attributes are different between the two. Given the two screenshots I'd expect them to look pretty much the same to any 3rd party OPC UA client though.

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<div class="post-metadata">

**Author:** ![Joe\_Bonhage](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/joe_bonhage/32/45543_2.png) [@Joe\_Bonhage](https://forum.inductiveautomation.com/u/Joe_Bonhage)\
**Post date:** [January 4, 2024, 5:04pm UTC](https://forum.inductiveautomation.com/t/ignition-opc-ua-server-data-types-client-troubleshooting/83799/3 "2024-01-04T17:04:51Z")

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Yep, attributes are exactly the same from UaExpert perspective. Let me dig into what's going on with the other client.

 ![IG Post 3](https://us1.discourse-cdn.com/inductiveautomation/original/3X/9/e/9ef64e36690713938dd344e002cd6df9c5b8cbd7.png)