# Designer Error at Launch

**URL:** <https://forum.inductiveautomation.com/t/designer-error-at-launch/11377>\
**Category:** Ignition\
**Created:** [March 17, 2016, 1:13pm UTC](https://forum.inductiveautomation.com/t/designer-error-at-launch/11377 "2016-03-17T13:13:15Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![gokhalej](https://avatars.discourse-cdn.com/v4/letter/g/a587f6/32.png) [@gokhalej](https://forum.inductiveautomation.com/u/gokhalej)\
**Post date:** [March 17, 2016, 1:13pm UTC](https://forum.inductiveautomation.com/t/designer-error-at-launch/11377/1 "2016-03-17T13:13:15Z")

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Hi,  
I am unable to launch Designer, as it throws up a java related error:

the error is: Error Launching Application: NoClassDefFoundError: javax/swing/AbstractButton$ButtonActionPropertyChangeListner

I have Ignition and jdk/jre installed in the same program files(x86) folder  
The image is attached herewith.  
[attachment=0]designer launch error.jpg[/attachment]

Pls help

Gokhale