# Restarting OPC UA

**URL:** <https://forum.inductiveautomation.com/t/restarting-opc-ua/4807>\
**Category:** Ignition\
**Created:** [July 12, 2012, 12:28pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807 "2012-07-12T12:28:24Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\
**Post date:** [July 12, 2012, 12:28pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/1 "2012-07-12T12:28:24Z")

</div>

Hello!

Sometimes I have to restart the module OPC UA because, even if all is working ok suddenly I can read tags coming from a PLC (connected using Modbus) but I can’t subscribe to them. Why Is this happening? 😕

---

<div class="post-metadata">

**Author:** ![nathan](https://avatars.discourse-cdn.com/v4/letter/n/c5a1d2/32.png) [@nathan](https://forum.inductiveautomation.com/u/nathan)\
**Post date:** [July 12, 2012, 1:02pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/2 "2012-07-12T13:02:21Z")

</div>

What errors do you see in the System Console logs in the gateway?

---

<div class="post-metadata">

**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\
**Post date:** [July 12, 2012, 1:33pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/3 "2012-07-12T13:33:44Z")

</div>

I didn’t look at the logs… next time the error happens I will take an snapshot.

---

<div class="post-metadata">

**Author:** ![nathan](https://avatars.discourse-cdn.com/v4/letter/n/c5a1d2/32.png) [@nathan](https://forum.inductiveautomation.com/u/nathan)\
**Post date:** [July 12, 2012, 1:46pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/4 "2012-07-12T13:46:46Z")

</div>

You should still be able to go back and check.

---

<div class="post-metadata">

**Author:** ![SamJaimes](https://avatars.discourse-cdn.com/v4/letter/s/a6a055/32.png) [@SamJaimes](https://forum.inductiveautomation.com/u/SamJaimes)\
**Post date:** [July 17, 2012, 10:43am UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/5 "2012-07-17T10:43:05Z")

</div>

Here is the log

[wrapper1.log](https://us1.discourse-cdn.com/inductiveautomation/original/2X/3/3915c31e3831ba9e71a9ee02506ddc8f410c21ab.log) (159 KB)

---

<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:** [July 17, 2012, 1:57pm UTC](https://forum.inductiveautomation.com/t/restarting-opc-ua/4807/6 "2012-07-17T13:57:47Z")

</div>

[quote=“SamJaimes”]Here is the log

[attachment=0]wrapper1.log[/attachment][/quote]

I don’t see anything specific, but try upgrading. You’re running 7.2.4 on whatever gateway that log is from.