# \[Critical\] UEFN Crashing regularly since 41.00 with excessive memory usage **URL:** \ **Category:** Issues and Bug Reporting\ **Tags:** open, fortnite-creative, unreal-editor-for-fortnite, fortnite\ **Created:** [June 9, 2026, 12:40am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317 "2026-06-09T00:40:02Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 12:40am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/1 "2026-06-09T00:40:02Z")
### Summary Nothing has changed in my workflow or settings outside of updating to 41.00 and an out of video memory error comes up and UEFN crashes (or sometimes Fortnite). I have a 16GB 4090 and an i9 with 32GB of memory. I’ve heard quite a few people are having this issue so I’m posting a bug finally. ### Please select what you are reporting on: Unreal Editor for Fortnite ### What Type of Bug are you experiencing? Stability ### Steps to Reproduce Just build stuff ### Expected Result UEFN should run forever like it did before 41.00 ### Observed Result UEFN crashes every third or so push of a map test ### Platform(s) PC ### Upload an image ![Screenshot 2026-06-08 173524.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/2/5/3251106da5b654e19735bcdb2775279a1ba67e1e.png) ![Screenshot 2026-06-08 173915.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/5/a/45a770f5a2982b4633e291beaba3651e62f9608b.png) ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 12:47am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/2 "2026-06-09T00:47:06Z")
Here’s a new error Fatal error: [File:Z:\UEVFS\Root\Engine\Source\Runtime\Core\Private\GenericPlatform\GenericPlatformMemory.cpp] [Line: 300] Ran out of memory allocating 3259194 (3.1 MiB) bytes with alignment 1. Last error msg: The paging file is too small for this operation to complete.. ![Screenshot 2026-06-08 174625](https://d3kjluh73b9h9o.cloudfront.net/original/4X/f/6/8/f68557c55e9792fe660004f0018e0de3fa78f68d.png) ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 1:09am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/4 "2026-06-09T01:09:13Z")
here’s a cool error message it just threw up before crashing ![Screenshot 2026-06-08 180752](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/5/4/454a92e02ac3fe0a083ac483254f532ec076b2ce.png) ![Screenshot 2026-06-08 180857](https://d3kjluh73b9h9o.cloudfront.net/original/4X/4/a/7/4a794e948c1f8f8dbabd296b3bf6b3b5777a8b71.png) ---
**Author:** ![OffTheX-Lee](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/offthex-lee/32/1171172_2.png) [@OffTheX-Lee](https://forums.unrealengine.com/u/OffTheX-Lee)\ **Post date:** [June 9, 2026, 1:24am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/5 "2026-06-09T01:24:34Z")
I ran into many times this weekend ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 1:32am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/6 "2026-06-09T01:32:36Z")
Here’s one more screenshot of what shows up in the logs when I start a session. ![Screenshot 2026-06-08 183057](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/f/a/0faa31910dae24721dcdfbbc80bd6bf008b37b56.jpeg) ---
**Author:** ![ozycreates](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ozycreates/32/1176800_2.png) [@ozycreates](https://forums.unrealengine.com/u/ozycreates)\ **Post date:** [June 9, 2026, 5:30am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/7 "2026-06-09T05:30:36Z")
I noticed in my particular case crashes happen while vs code is open, it causes UEFN to consume way too much memory ---
**Author:** ![ozycreates](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/ozycreates/32/1176800_2.png) [@ozycreates](https://forums.unrealengine.com/u/ozycreates)\ **Post date:** [June 9, 2026, 7:00am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/8 "2026-06-09T07:00:28Z")
Also, after crashing even ONCE I can’t launch session ever again. I have to restart my PC. ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [June 9, 2026, 10:34am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/9 "2026-06-09T10:34:36Z")
Thanks for the report, getting this to the team. ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [June 9, 2026, 10:37am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/10 "2026-06-09T10:37:38Z")
@GraemeBB and anyone else this is happening to, could we please get your logs? > [@How to get your Fortnite logs](https://forums.unrealengine.com/t/how-to-get-your-fortnite-logs/682382): > > At times, we will ask you to send us your logs when you’re having an issue in UEFN. Here is how to do that: UEFN Logs Exit Fortnite. Click on Start or press the Windows Key + R. Type \AppData\Local\UnrealEditorFortnite\Saved\Logs and press Enter. Zip your Logs folder and attach the zip file to your reply. To find UEFN Logs while working in UEFN: Click “Output Log” at the bottom of the window. Click on “Setting” at the top right of the window Click “Open Source Location” Zip your Logs folder… ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 4:23pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/11 "2026-06-09T16:23:37Z")
[UnrealEditorFortnite.zip](https://forums.unrealengine.com/uploads/short-url/zagTfLzhNvc4m7HKFKm5KF6rxRr.zip) (383.2 KB) ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 4:25pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/12 "2026-06-09T16:25:10Z")
[FortniteGame.zip](https://forums.unrealengine.com/uploads/short-url/j2zDOcm1ISqUFrx6VtMtltdb4mr.zip) (1.2 MB) ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 9, 2026, 4:25pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/13 "2026-06-09T16:25:24Z")
when this happens, both fortnite and UEFN crash ---
**Author:** ![JJeremyy](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@JJeremyy](https://forums.unrealengine.com/u/JJeremyy)\ **Post date:** [June 9, 2026, 6:25pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/14 "2026-06-09T18:25:41Z")
Seems to be happening on PS5 as well. Whenever you’re trying to access the portal inside the lobby, the game crashes. ---
**Author:** ![ManuM697](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@ManuM697](https://forums.unrealengine.com/u/ManuM697)\ **Post date:** [June 10, 2026, 3:27am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/16 "2026-06-10T03:27:16Z")
> [@Flak](#): > > > [@](#): > > > > At times, we will ask you to send us your logs when you’re having an issue in UEFN. Here is how to do that: UEFN Logs Exit Fortnite. Click on Start or press the Windows Key + R. Type \AppData\Local\UnrealEditorFortnite\Saved\Logs and press Enter. Zip your Logs folder and attach the zip file to your reply. To find UEFN Logs while working in UEFN: Click “Output Log” at the bottom of the window. Click on “Setting” at the top right of the window Click “Open Source Location” Zip your Logs folder… [UnrealEditorFortnite.zip](https://forums.unrealengine.com/uploads/short-url/dph1dHWAdyZdpjDF1v7eJt1o41c.zip) (312.4 KB) ---
**Author:** ![Gros-PRIMATE](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/gros-primate/32/1092595_2.png) [@Gros-PRIMATE](https://forums.unrealengine.com/u/Gros-PRIMATE)\ **Post date:** [June 10, 2026, 11:54pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/17 "2026-06-10T23:54:13Z")
all the same for me, it become really hard to work, i never crash like this before ---
**Author:** ![Flak](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/flak/32/769441_2.png) [@Flak](https://forums.unrealengine.com/u/Flak)\ **Post date:** [June 11, 2026, 1:07pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/18 "2026-06-11T13:07:02Z")
Hi Graeme, you may have run out of page file commit (virtual memory), causing it to crash. Is it possible that other programs are using up the rest of your virtual memory? According to the log file it seems like the editor is not using more than 30 GB of the 130 GB page file You can also look at adjusting your page file maximum above 130 GB ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 11, 2026, 1:19pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/19 "2026-06-11T13:19:17Z")
I really don’t want to touch my pagefile settings as that is supposed to be a last resort for a computer to use because it’s so slow and inefficient and causes premature wear on hard drives. 130GB is a crazy amount as it is. To note, nothing has changed in my workflow or computer from before 41.00 and after. Nothing new installed and nothing changed. I wish it was my computer that was the problem but this hasn’t happened for many versions of UEFN and now it happens all the time. Interestingly it happens only in one project so far. Other projects it doesn’t crash. Something in the project is causing excessive memory consumption and it’s running wild but I have no idea what it could be. I talked to Garren as well as UEFN will crash by simply trying to check files in, literally upon clicking that button, so he’s submitted in to the bug as well supposedly. VSCode is constantly disconnecting as well and can give me an indication when UEFN and/or Fortnite is about to crash. Everything is so much slower. I really hope Epic finds the change they made that is causing UEFN to consume too much memory in comparison to before. I ordered more memory to upgrade to 64GB and it arrives today and I’ll probably not have this issue, but 32GB on a machine should be enough otherwise development for Fortnite games is just going to be priced out for too many people maybe? Not sure, but it was fine before 41.00. ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 11, 2026, 4:33pm UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/20 "2026-06-11T16:33:07Z")
just a side note, this also crashes my laptop which also has 32GB in it and is running a 4080RTX with i9 in it. Oddly, it happened when I moved the “edit list” panel to another spot that would hide it as there doesn’t seem to be a way to stop it from popping up all the time. Maybe related… ---
**Author:** ![GraemeBB](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/graemebb/32/1106150_2.png) [@GraemeBB](https://forums.unrealengine.com/u/GraemeBB)\ **Post date:** [June 12, 2026, 6:10am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/21 "2026-06-12T06:10:36Z")
I upgraded my memory to 64GB and so far no crashes, so I won’t be much use to determine what crashes UEFN in this case but hopefully what I’ve provided will help. ---
**Author:** ![MistJawa](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/mistjawa/32/775721_2.png) [@MistJawa](https://forums.unrealengine.com/u/MistJawa)\ **Post date:** [June 12, 2026, 8:58am UTC](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317/22 "2026-06-12T08:58:18Z")
i am also running into the same issue uefn crashes almost every time after closing vs code and wont allow to launch a session after the first crash have to restart pc. [Next page](https://forums.unrealengine.com/t/critical-uefn-crashing-regularly-since-41-00-with-excessive-memory-usage/2727317.md?page=2)