# Engine crashes while using Interface

**URL:** <https://forums.unrealengine.com/t/engine-crashes-while-using-interface/482391>\
**Category:** UI\
**Tags:** interface, debug, unreal-engine, crash, Scripting, cast, question\
**Created:** [April 23, 2021, 11:49pm UTC](https://forums.unrealengine.com/t/engine-crashes-while-using-interface/482391 "2021-04-23T23:49:32Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![M.AbdullahSultan](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/m.abdullahsultan/32/564057_2.png) [@M.AbdullahSultan](https://forums.unrealengine.com/u/M.AbdullahSultan)\
**Post date:** [April 23, 2021, 11:49pm UTC](https://forums.unrealengine.com/t/engine-crashes-while-using-interface/482391/1 "2021-04-23T23:49:32Z")

</div>

Hello!  
I wanna call Damage functionality in Enemy class when Bullet (of Actor Class) overlaps it

 ![336942-screenshot-2021-04-24-043516.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/9/7/4/97451306cbba5183ecef97d0ffd0af1924a60bf3.png)

For that if i use Cast and then call LALALA function it works fine but if use Interface to call Damage functionality Engine Crashes as shown below

 ![336943-screenshot-2021-04-24-043444.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/e/1/7/e17768227a04da6ca755b40c8847628a08f86b3e.png)

Crash happens when Bullet object overlaps a Enemy pawn (Collision preset of Bullet is set to (OverlapPawnOnly)

 ![336944-screenshot-2021-04-24-044205.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/e/d/c/edc3c7255b92eec99dd5af60ea32cdc513cd7696.png)

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<div class="post-metadata">

**Author:** ![M.AbdullahSultan](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/m.abdullahsultan/32/564057_2.png) [@M.AbdullahSultan](https://forums.unrealengine.com/u/M.AbdullahSultan)\
**Post date:** [April 24, 2021, 11:48am UTC](https://forums.unrealengine.com/t/engine-crashes-while-using-interface/482391/2 "2021-04-24T11:48:43Z")

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Crash log

 ![336950-screenshot-2021-04-24-164807.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/a/6/f/a6fe6e7557e7f671a8f34eb9b2ddf6256aaf52cc.png)

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<div class="post-metadata">

**Author:** ![emmagrey67\_1](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@emmagrey67\_1](https://forums.unrealengine.com/u/emmagrey67_1)\
**Post date:** [April 24, 2021, 12:13pm UTC](https://forums.unrealengine.com/t/engine-crashes-while-using-interface/482391/3 "2021-04-24T12:13:45Z")

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