# OPC UA don't reconnect after communication lost

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204>\
**Category:** Ignition\
**Tags:** ignition83\
**Created:** [November 15, 2025, 8:30am UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204 "2025-11-15T08:30:10Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![SBL\_MC](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbl_mc/32/56813_2.png) [@SBL\_MC](https://forum.inductiveautomation.com/u/SBL_MC)\
**Post date:** [November 15, 2025, 8:30am UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204/1 "2025-11-15T08:30:10Z")

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Hi all,

Using updating to 8.3.1: after a device has lost it connection due to power cycles, it does not reconnect. Anyone else experienced this ?

Very little information to share as we where dealing with it late Friday evening and didn’t copy that much. But need to get it going again Monday. Thanks

onWatchdogTimerElapsed(): subscription deletion failure

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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:** [November 15, 2025, 11:51am UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204/2 "2025-11-15T11:51:40Z")

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We’ll need logs and a Wireshark capture to get anywhere. This isn’t enough information to act on.

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**Author:** ![SBL\_MC](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbl_mc/32/56813_2.png) [@SBL\_MC](https://forum.inductiveautomation.com/u/SBL_MC)\
**Post date:** [November 15, 2025, 1:16pm UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204/3 "2025-11-15T13:16:17Z")

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We clearly need to collect more data, but here is a bit more…

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/534669b67cd396dd6beaa27a6b019ea998446fcb.png)

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/5/3/539c44be677a2f6183e9cec9c71dbfacd136068d.png)

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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:** [November 15, 2025, 2:34pm UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204/4 "2025-11-15T14:34:45Z")

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All that we’re really seeing here is that you’ve lost your connection to the server and the reconnection attempt hasn’t succeeded yet because opening the TCP connection times out.

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<div class="post-metadata">

**Author:** ![SBL\_MC](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/sbl_mc/32/56813_2.png) [@SBL\_MC](https://forum.inductiveautomation.com/u/SBL_MC)\
**Post date:** [November 16, 2025, 1:36pm UTC](https://forum.inductiveautomation.com/t/opc-ua-dont-reconnect-after-communication-lost/112204/5 "2025-11-16T13:36:59Z")

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I can add that uaExpert connected to the same server w/o any hickups. Wel will dig into it first thing tomorrow.