# Editor instantly crashing

**URL:** <https://forums.unrealengine.com/t/editor-instantly-crashing/334906>\
**Category:** Blueprint\
**Tags:** unreal-engine, crash, CPP, Blueprint, question\
**Created:** [October 10, 2015, 9:15pm UTC](https://forums.unrealengine.com/t/editor-instantly-crashing/334906 "2015-10-10T21:15:17Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![anonymous\_user\_41845f4a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_41845f4a](https://forums.unrealengine.com/u/anonymous_user_41845f4a)\
**Post date:** [October 14, 2015, 2:40pm UTC](https://forums.unrealengine.com/t/editor-instantly-crashing/334906/6 "2015-10-14T14:40:36Z")

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You can find information here for printing out an FVector for testing purposes:

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>
> 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 — https://unrealcommunity.wiki/! You will be able to find content from...

As far as setting your AIController, does the AI that you intended to control with this controller exist in the level before runtime? If so, you can select it from the World Outliner and set its AIController in the details panel.

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