# \[IGN-13095\]WebDev Depends On EventStream module

**URL:** <https://forum.inductiveautomation.com/t/ign-13095-webdev-depends-on-eventstream-module/107058>\
**Category:** Ignition 8.3 Early Access\
**Created:** [June 4, 2025, 9:05pm UTC](https://forum.inductiveautomation.com/t/ign-13095-webdev-depends-on-eventstream-module/107058 "2025-06-04T21:05:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [June 4, 2025, 9:05pm UTC](https://forum.inductiveautomation.com/t/ign-13095-webdev-depends-on-eventstream-module/107058/1 "2025-06-04T21:05:32Z")

</div>

Just noticed this on the build I downloaded yesterday (internal dates are June 2).

```python
com.inductiveautomation.ignition.common.modules.ModuleLoadException: Unable to load hook class "com.inductiveautomation.webdev.gateway.GatewayHook" for module "com.inductiveautomation.webdev".
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.loadHook(ModuleInstance.java:588)
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.load(ModuleInstance.java:262)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.loadModules(ModuleManagerImpl.java:301)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.init(ModuleManagerImpl.java:157)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1025)
	at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.startup(RedundancyManagerImpl.java:338)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.initRedundancy(IgnitionGateway.java:785)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.lambda$initInternal$2(IgnitionGateway.java:710)
	at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:550)
	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$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: com/inductiveautomation/eventstream/RegistryItem
	at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
	at java.base/java.lang.Class.getConstructor0(Unknown Source)
	at java.base/java.lang.Class.getDeclaredConstructor(Unknown Source)
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.loadHook(ModuleInstance.java:566)
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.load(ModuleInstance.java:262)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.loadModules(ModuleManagerImpl.java:301)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.init(ModuleManagerImpl.java:157)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1025)
	at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.startup(RedundancyManagerImpl.java:338)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.initRedundancy(IgnitionGateway.java:785)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.lambda$initInternal$2(IgnitionGateway.java:710)
	at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:550)
	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$Worker.run(Unknown Source)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.eventstream.RegistryItem
	at java.base/java.net.URLClassLoader.findClass(Unknown Source)
	at com.inductiveautomation.ignition.gateway.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:37)
	at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
	at com.inductiveautomation.ignition.gateway.modules.ModuleClassLoader.loadClass(ModuleClassLoader.java:85)
	at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
	at java.base/java.lang.Class.getDeclaredConstructors0(Native Method)
	at java.base/java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
	at java.base/java.lang.Class.getConstructor0(Unknown Source)
	at java.base/java.lang.Class.getDeclaredConstructor(Unknown Source)
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.loadHook(ModuleInstance.java:566)
	at com.inductiveautomation.ignition.gateway.modules.ModuleInstance.load(ModuleInstance.java:262)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.loadModules(ModuleManagerImpl.java:301)
	at com.inductiveautomation.ignition.gateway.modules.ModuleManagerImpl.init(ModuleManagerImpl.java:157)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.startupInternal(IgnitionGateway.java:1025)
	at com.inductiveautomation.ignition.gateway.redundancy.RedundancyManagerImpl.startup(RedundancyManagerImpl.java:338)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.initRedundancy(IgnitionGateway.java:785)
	at com.inductiveautomation.ignition.gateway.IgnitionGateway.lambda$initInternal$2(IgnitionGateway.java:710)
	at com.inductiveautomation.ignition.common.execution.impl.BasicExecutionEngine$ThrowableCatchingRunnable.run(BasicExecutionEngine.java:550)
	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)

```

I was trying to prune my test environment down to a minimum. 🤷‍♂️

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [June 4, 2025, 9:11pm UTC](https://forum.inductiveautomation.com/t/ign-13095-webdev-depends-on-eventstream-module/107058/2 "2025-06-04T21:11:53Z")

</div>

Womp womp. I'll get a ticket going.