# \[Bug\] OPC-UA module faulted after upgrade from 7.9.7 to 8 Beta

**URL:** <https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587>\
**Category:** Ignition Early Access\
**Created:** [November 6, 2018, 8:37pm UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587 "2018-11-06T20:37:53Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mik977](https://avatars.discourse-cdn.com/v4/letter/m/5f8ce5/32.png) [@mik977](https://forum.inductiveautomation.com/u/mik977)\
**Post date:** [November 6, 2018, 8:37pm UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587/1 "2018-11-06T20:37:53Z")

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OPC-UA moule in Faulted state after upgrade.

Reported Exception:  
java.lang.IllegalArgumentException: Invalid UUID string:

Platform: Windows10  
Ignition version: 8.0.0-beta0 (b2018110602)  
Java version: 11.0.1

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**Author:** ![James.Lorenz](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/james.lorenz/32/3290_2.png) [@James.Lorenz](https://forum.inductiveautomation.com/u/James.Lorenz)\
**Post date:** [November 6, 2018, 8:44pm UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587/2 "2018-11-06T20:44:39Z")

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Can you upload the wrapper log? We need the full trace for the exception to help debug the issue.

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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 6, 2018, 8:57pm UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587/3 "2018-11-06T20:57:25Z")

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This might be tricky because Windows will hide this file by default, but in the `$INSTALL/data/opcua` directory there should be a `.uuid` file… try deleting this and restarting the gateway? From the error message it looks like somehow it exists but is empty.

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<div class="post-metadata">

**Author:** ![mik977](https://avatars.discourse-cdn.com/v4/letter/m/5f8ce5/32.png) [@mik977](https://forum.inductiveautomation.com/u/mik977)\
**Post date:** [November 7, 2018, 6:52am UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587/4 "2018-11-07T06:52:23Z")

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@Kevin.Herron  
Yes, that worked. After the restart the OPC connection to the Ignition OPC-UA server was failing with the following exception (I managed to get it working again by setting the connection endpoint again):

UaException: status=Bad\_CertificateUriInvalid, message=The URI specified in the ApplicationDescription does not match the URI in the Certificate.

```
at org.eclipse.milo.opcua.stack.core.util.CertificateValidationUtil.validateApplicationUri(CertificateValidationUtil.java:222)

at com.inductiveautomation.ignition.gateway.opcua.client.ClientManager.initializeObject(ClientManager.kt:107)

at com.inductiveautomation.ignition.gateway.opcua.client.ClientManager$initializeObject$1.invokeSuspend(ClientManager.kt)

at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:32)

at kotlinx.coroutines.DispatchedTask$DefaultImpls.run(Dispatched.kt:235)

at kotlinx.coroutines.AbstractContinuation.run(AbstractContinuation.kt:19)

at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.base/java.lang.Thread.run(Unknown Source)

```

8.0.0-beta0 (b2018110602)  
Azul Systems, Inc. 11.0.1

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<div class="post-metadata">

**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\
**Post date:** [December 8, 2018, 1:08am UTC](https://forum.inductiveautomation.com/t/bug-opc-ua-module-faulted-after-upgrade-from-7-9-7-to-8-beta/20587/5 "2018-12-08T01:08:10Z")

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This was fixed on the nightly uploaded on 11/7