# OPC client freeze and tags no longer update after a brief connection lost

**URL:** <https://forum.inductiveautomation.com/t/opc-client-freeze-and-tags-no-longer-update-after-a-brief-connection-lost/84014>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [January 10, 2024, 4:44am UTC](https://forum.inductiveautomation.com/t/opc-client-freeze-and-tags-no-longer-update-after-a-brief-connection-lost/84014 "2024-01-10T04:44:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nideyijuyidong](https://avatars.discourse-cdn.com/v4/letter/n/7cd45c/32.png) [@nideyijuyidong](https://forum.inductiveautomation.com/u/nideyijuyidong)\
**Post date:** [January 10, 2024, 4:44am UTC](https://forum.inductiveautomation.com/t/opc-client-freeze-and-tags-no-longer-update-after-a-brief-connection-lost/84014/1 "2024-01-10T04:44:08Z")

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The networking broke at local switch and remote switch for 10-30 seconds.(Ignition server--local switch--remote switch--OPC server) Then the Ignition OPC client froze for hours until I restart the OPC module manually. Everything showed good, OPC client connection, tags quality, but tags no longer update anymore. I tried another OPC client tool and checked out the OPC server, it worked fine. I noticed this error because of the abnormal chart.  
It happened twice. Version is 8.1.33.  
I tried to enable the server diagnostics, but failed by "Diagnostics may not be supported by server."  
Any advice? Should I upload any logs(which one...)  
Thanks for any reply.

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**Author:** ![nideyijuyidong](https://avatars.discourse-cdn.com/v4/letter/n/7cd45c/32.png) [@nideyijuyidong](https://forum.inductiveautomation.com/u/nideyijuyidong)\
**Post date:** [July 31, 2025, 5:51am UTC](https://forum.inductiveautomation.com/t/opc-client-freeze-and-tags-no-longer-update-after-a-brief-connection-lost/84014/2 "2025-07-31T05:51:14Z")

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Same issue on 8.1.48.A third part OPC server. Tag quality is good; OPC connection is connected. Restart tag, not work; third part OPC client, works fine. Server Status currentTime params, update normally.

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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:** [July 31, 2025, 11:20am UTC](https://forum.inductiveautomation.com/t/opc-client-freeze-and-tags-no-longer-update-after-a-brief-connection-lost/84014/3 "2025-07-31T11:20:33Z")

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Easiest route for troubleshooting would be a Wireshark capture. Disable any security on the connection so it can be read.