# OPC UA Server Faulted v8

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762>\
**Category:** Ignition Early Access\
**Created:** [December 17, 2019, 1:35pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762 "2019-12-17T13:35:43Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![HALW80](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@HALW80](https://forum.inductiveautomation.com/u/HALW80)\
**Post date:** [December 17, 2019, 1:35pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762/1 "2019-12-17T13:35:43Z")

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I have upgraded to V8.0 in order to take the Ignition core exam and uploaded gwbk file provided by ignition

Ignition OPC UA Server is faulted and I am getting the following error  
UaException: status=Bad\_CertificateUriInvalid, message=The URI specified in the ApplicationDescription does not match the URI in the Certificate.

When I look at the opc-ua security settings the certs are showing invalid date

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/a/a48f56b335e19991ff38fbc503d623228692b67d.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:** [December 17, 2019, 2:28pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762/2 "2019-12-17T14:28:29Z")

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Hmm.

Try shutting down the gateway and then deleting these files:

- `$IGNITION/data/opcua/client/security/certificates.pfx`
- `$IGNITION/data/opcua/server/security/certificates.pfx`

Then start it up again.

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<div class="post-metadata">

**Author:** ![HALW80](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@HALW80](https://forum.inductiveautomation.com/u/HALW80)\
**Post date:** [December 17, 2019, 2:41pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762/3 "2019-12-17T14:41:18Z")

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what gwcmd would I use to stop… I see -r to restart alright

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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:** [December 17, 2019, 2:44pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762/4 "2019-12-17T14:44:05Z")

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You can probably just delete those files and then restart it.

I don’t know if the gwcmd has start/stop service. If you’re on the command line you can already do that via the appropriate commands for your OS (`net stop ignition` etc…)

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<div class="post-metadata">

**Author:** ![HALW80](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@HALW80](https://forum.inductiveautomation.com/u/HALW80)\
**Post date:** [December 17, 2019, 2:44pm UTC](https://forum.inductiveautomation.com/t/opc-ua-server-faulted-v8/30762/5 "2019-12-17T14:44:59Z")

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Deleting and restarting worked. Thanks again