# Error loading ignition designer

**URL:** <https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226>\
**Category:** Ignition\
**Created:** [September 9, 2013, 7:15pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226 "2013-09-09T19:15:54Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![David](https://avatars.discourse-cdn.com/v4/letter/d/aeb1de/32.png) [@David](https://forum.inductiveautomation.com/u/David)\
**Post date:** [September 9, 2013, 7:15pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/1 "2013-09-09T19:15:54Z")

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Sorry I have to cut and paste, but the details on the error were:

com.inductiveautomation.ignition.common.modules.ModuleLoadException: Error loading hook class “com.inductiveautomation.ignition.alarming.designer.DesignerHook” for module “Alarm Notification”.  
at com.inductiveautomation.ignition.designer.IgnitionDesigner.loadModules(IgnitionDesigner.java:841)  
at com.inductiveautomation.ignition.designer.IgnitionDesigner.startup(IgnitionDesigner.java:309)  
at com.inductiveautomation.ignition.designer.DesignerStartupHook$2.run(DesignerStartupHook.java:275)  
at java.awt.event.InvocationEvent.dispatch(Unknown Source)  
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)  
at java.awt.EventQueue.access$200(Unknown Source)  
at java.awt.EventQueue$3.run(Unknown Source)  
at java.awt.EventQueue$3.run(Unknown Source)  
at java.security.AccessController.doPrivileged(Native Method)  
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)  
at java.awt.EventQueue.dispatchEvent(Unknown Source)  
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)  
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)  
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)  
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)  
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)  
at java.awt.EventDispatchThread.run(Unknown Source)  
Caused by: java.lang.NoClassDefFoundError: com/inductiveautomation/vision/api/designer/palette/PaletteItem  
at java.lang.Class.forName0(Native Method)  
at java.lang.Class.forName(Unknown Source)  
at com.inductiveautomation.ignition.designer.IgnitionDesigner.loadModules(IgnitionDesigner.java:836)  
… 16 more  
Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.vision.api.designer.palette.PaletteItem  
at java.net.URLClassLoader$1.run(Unknown Source)  
at java.net.URLClassLoader$1.run(Unknown Source)  
at java.security.AccessController.doPrivileged(Native Method)  
at java.net.URLClassLoader.findClass(Unknown Source)  
at java.lang.ClassLoader.loadClass(Unknown Source)  
at java.lang.ClassLoader.loadClass(Unknown Source)  
… 19 more

Ignition v7.6.2 (b2368)  
Java: Oracle Corporation 1.7.0\_25

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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:** [September 9, 2013, 7:54pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/2 "2013-09-09T19:54:37Z")

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Can you see what version of the alarm notification module you have installed?

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<div class="post-metadata">

**Author:** ![David](https://avatars.discourse-cdn.com/v4/letter/d/aeb1de/32.png) [@David](https://forum.inductiveautomation.com/u/David)\
**Post date:** [September 10, 2013, 3:21pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/3 "2013-09-10T15:21:32Z")

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1.6.2(b377)

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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:** [September 10, 2013, 3:29pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/4 "2013-09-10T15:29:12Z")

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Is the Vision module installed? This is pretty bizarre…

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<div class="post-metadata">

**Author:** ![Dan\_Bridgeman](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/dan_bridgeman/32/3610_2.png) [@Dan\_Bridgeman](https://forum.inductiveautomation.com/u/Dan_Bridgeman)\
**Post date:** [September 10, 2013, 3:32pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/5 "2013-09-10T15:32:30Z")

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It looks like we do not have the Vision module installed.

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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:** [September 10, 2013, 3:35pm UTC](https://forum.inductiveautomation.com/t/error-loading-ignition-designer/7226/6 "2013-09-10T15:35:55Z")

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Ahh, well that would do it…

We’re gonna fix this so it more gracefully degrades.