# Error launching designer for windows **URL:** \ **Category:** Ignition Early Access\ **Created:** [November 29, 2018, 12:19pm UTC](https://forum.inductiveautomation.com/t/error-launching-designer-for-windows/21128 "2018-11-29T12:19:47Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![npenhallurick](https://avatars.discourse-cdn.com/v4/letter/n/8797f3/32.png) [@npenhallurick](https://forum.inductiveautomation.com/u/npenhallurick)\ **Post date:** [November 29, 2018, 12:19pm UTC](https://forum.inductiveautomation.com/t/error-launching-designer-for-windows/21128/1 "2018-11-29T12:19:47Z")
i am trying to launch ignition designer for windows and i get the following error error launching application: Class Not Found Exception: Null any help as to how to resolve this would be gratefully apprectiated kind regards Neil ---
**Author:** ![cmallonee](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmallonee/32/6416_2.png) [@cmallonee](https://forum.inductiveautomation.com/u/cmallonee)\ **Post date:** [November 29, 2018, 3:22pm UTC](https://forum.inductiveautomation.com/t/error-launching-designer-for-windows/21128/2 "2018-11-29T15:22:14Z")
We're already working on resolving this with another thread. > [@ClassNotFoundException launching Designer](http://forum.inductiveautomation.com/t/classnotfoundexception-launching-designer/20908): > > I uninstalled the 7.9 version and did a fresh install of V8. I get following error on launching the designer ---
**Author:** ![cmallonee](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/cmallonee/32/6416_2.png) [@cmallonee](https://forum.inductiveautomation.com/u/cmallonee)\ **Post date:** [November 29, 2018, 3:22pm UTC](https://forum.inductiveautomation.com/t/error-launching-designer-for-windows/21128/3 "2018-11-29T15:22:19Z")