# OPC server connection is faulted even after OPC module uninstalled

**URL:** <https://forum.inductiveautomation.com/t/opc-server-connection-is-faulted-even-after-opc-module-uninstalled/81323>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [November 1, 2023, 5:00pm UTC](https://forum.inductiveautomation.com/t/opc-server-connection-is-faulted-even-after-opc-module-uninstalled/81323 "2023-11-01T17:00:14Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Somesh\_Pund](https://avatars.discourse-cdn.com/v4/letter/s/a3d4f5/32.png) [@Somesh\_Pund](https://forum.inductiveautomation.com/u/Somesh_Pund)\
**Post date:** [November 1, 2023, 5:00pm UTC](https://forum.inductiveautomation.com/t/opc-server-connection-is-faulted-even-after-opc-module-uninstalled/81323/1 "2023-11-01T17:00:14Z")

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During upgradation of ignition Scada, getting following error, even after OPC module uninstalled:  
java.lang.Exception: OPC server connection is faulted. Type "com.inductiveautomation.OpcUaServerType" is not a known server type. at com.inductiveautomation.ignition.gateway.opc.OpcConnectionManagerImpl.newOpcConnection(OpcConnectionManagerImpl.java:168) at com.inductiveautomation.ignition.gateway.opc.OpcConnectionManagerImpl.addAllServers(OpcConnectionManagerImpl.java:144) at com.inductiveautomation.ignition.gateway.opc.OpcConnectionManagerImpl.startup(OpcConnectionManagerImpl.java:95) at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1248) at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.startup(RedundancyManagerImpl.java:301) at com.inductiveautomation.ignition.gateway.IgnitionGateway.initRedundancy(IgnitionGateway.java:748) at com.inductiveautomation.ignition.gateway.IgnitionGateway.lambda$initInternal$0(IgnitionGateway.java:682) at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:544) at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source) at java.base/java.util.concurrent.FutureTask.run(Unknown Source) at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknown Source) 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) 8.1.33 (b2023101913) Azul Systems, Inc. 17.0.8

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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 1, 2023, 5:03pm UTC](https://forum.inductiveautomation.com/t/opc-server-connection-is-faulted-even-after-opc-module-uninstalled/81323/2 "2023-11-01T17:03:29Z")

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> [@Somesh\_Pund](#):
>
> even after OPC module uninstalled

Uninstalling the OPC UA module will absolutely _cause_ this error.

Reinstall it, restart your Ignition Gateway, then post any new issues you have.