# Device crash on " Open Level "

**URL:** <https://forums.unrealengine.com/t/device-crash-on-open-level/364506>\
**Category:** World Creation\
**Tags:** unreal-engine, crash, level, bug-report, UE4, question\
**Created:** [July 19, 2016, 5:10pm UTC](https://forums.unrealengine.com/t/device-crash-on-open-level/364506 "2016-07-19T17:10:32Z")\
**Posts on this page:** 3\
**Page:** 2

<div class="post-metadata">

**Author:** ![anonymous\_user\_93658b41](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_93658b41](https://forums.unrealengine.com/u/anonymous_user_93658b41)\
**Post date:** [August 22, 2016, 6:52am UTC](https://forums.unrealengine.com/t/device-crash-on-open-level/364506/21 "2016-08-22T06:52:45Z")

</div>

The sizes of the texture are randomly. I remove my material and texture folder and yes it improved alot, im not experiencing any crash on opening level except for one map, but 10 out of 11 map is a big improvement, i also create 5 new map with one object in it and im not experiencing any crash as well, so i guess the problem is on the textures and materials. How do i know which one is causing the crash? Is there a specific size for mobile ? Do the size of the texture impact performance like hiccups which I’m also experiencing?

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_b9532c9a](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_b9532c9a](https://forums.unrealengine.com/u/anonymous_user_b9532c9a)\
**Post date:** [August 22, 2016, 5:26pm UTC](https://forums.unrealengine.com/t/device-crash-on-open-level/364506/22 "2016-08-22T17:26:19Z")

</div>

Hi Juanjose09,

Here are the sizes available for mobile devices:

 ![103944-materialsizes.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/d/d/6/dd6367a853e6c966e91ec6cb8c0f659216211913.png)

The sizes of textures and materials easily could have an impact on your games performance.

You can find more on materials for mobile devices here:

> **[Mobile Rendering Features](https://docs.unrealengine.com/5.1/en-US/rendering-features-for-mobile-games-in-unreal-engine/)**
>
> Learn about Unreal Engine's mobile rendering path and its support for graphics features.

Follow the guidelines on these pages that have been linked and see if your error still occurs.

The best thing to do to determine the cause of the crash is to remove the folder, then add each material/texture back one at a time until the crash occurs again.

---

<div class="post-metadata">

**Author:** ![anonymous\_user\_93658b41](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_93658b41](https://forums.unrealengine.com/u/anonymous_user_93658b41)\
**Post date:** [September 6, 2016, 1:50pm UTC](https://forums.unrealengine.com/t/device-crash-on-open-level/364506/23 "2016-09-06T13:50:31Z")

</div>

Resolve!

A materal was causing the crash.

At the moment i’m not experiencing any crash since I removed my material folder.

Thanks for the help.

However I still experiencing some performance issues since this is another topic I posted a new answer hope you can help me out since you already know a couple details

> **[Mobile Performance Issues on IOS Device](https://forums.unrealengine.com/questions/483181/mobile-performance-issues-on-ios-device.html)**
>
> I’m experiencing some hiccups while playing, I tried numerous of things but no luck the hiccups still occurs. Things I tried : In Materials, on Mobile tab i disable use lightmap direction and enable Fully Rough and High Quality Reflection. In...

[Previous page](https://forums.unrealengine.com/t/device-crash-on-open-level/364506.md?page=1)