# Editor becomes unresponsive when certain class blueprint is open **URL:** \ **Category:** Blueprint\ **Tags:** editor-freezes, unreal-engine, bug-report, editor, Blueprint, question\ **Created:** [September 28, 2015, 3:18pm UTC](https://forums.unrealengine.com/t/editor-becomes-unresponsive-when-certain-class-blueprint-is-open/333653 "2015-09-28T15:18:10Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![Lovecraft\_K](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Lovecraft\_K](https://forums.unrealengine.com/u/Lovecraft_K)\ **Post date:** [September 29, 2015, 5:44pm UTC](https://forums.unrealengine.com/t/editor-becomes-unresponsive-when-certain-class-blueprint-is-open/333653/4 "2015-09-29T17:44:46Z")
Hi ag858 - Can you post a screenshot of the offending node and set up you are using in 4.7.6 and in 4.9.1? I know that there was an issue with the Post Processing Node causing a Video Driver crash, but this was a new issue specific to 4.9. If you could also take a look at the Windows Event Viewer and post the logs that windows generated when the engine crashed for you. You can use this wiki for reference to using Windows Event Viewer: > **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)** > > After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — ue4community.wiki! You will be able to find content from the official... Thank You Eric Ketchum --- _[View the full topic](https://forums.unrealengine.com/t/editor-becomes-unresponsive-when-certain-class-blueprint-is-open/333653)._