# \#memory-leak **URL:** https://forums.unrealengine.com/tag/memory-leak/9878.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [\[5.8.4\] MetaHuman Creator: editor memory grows by 5–18 GB per scripted build and is never released ](https://forums.unrealengine.com/t/5-8-4-metahuman-creator-editor-memory-grows-by-5-18-gb-per-scripted-build-and-is-never-released/2848954)
**Author:** [@Xantji](https://forums.unrealengine.com/u/Xantji)\ **Replies:** 0\ **Last updated:** [November 2, 2026, 3:52pm UTC](https://forums.unrealengine.com/t/5-8-4-metahuman-creator-editor-memory-grows-by-5-18-gb-per-scripted-build-and-is-never-released/2848954 "2026-11-02T15:52:09Z")
Summary When MetaHumans are created and built by Python script in the editor (MetaHuman Creator in UE 5.8), the editor process grows by 5–18 GB with every build and never gives the memory back: not after closing the char… --- ## [Massive bug in Epic Games Launcher VRAM Usage](https://forums.unrealengine.com/t/massive-bug-in-epic-games-launcher-vram-usage/2231906)
**Author:** [@SGGhostRider](https://forums.unrealengine.com/u/SGGhostRider)\ **Replies:** 60\ **Last updated:** [August 27, 2026, 8:03am UTC](https://forums.unrealengine.com/t/massive-bug-in-epic-games-launcher-vram-usage/2231906 "2026-08-27T08:03:10Z")
It has been a month since i noticed it and i can’t believe nobody have reported it yet, since a month or so(it might be more) the epic games launcher started using 4Gb of VRAM after launch, NOT system RAM, VIDEO RAM, GPU… --- ## [PixelStreaming Memory Leak in 5.7+](https://forums.unrealengine.com/t/pixelstreaming-memory-leak-in-5-7/2712465)
**Author:** [@Embr](https://forums.unrealengine.com/u/Embr)\ **Replies:** 3\ **Last updated:** [May 26, 2026, 7:15am UTC](https://forums.unrealengine.com/t/pixelstreaming-memory-leak-in-5-7/2712465 "2026-05-26T07:15:17Z")
When running PixelStreaming2 plugin and using h264 as the encoder, the application begins to leak and eventually crashes. This has been reported several times for past versions, but we didn’t experience this on 5.6, we s… --- ## [SceneCapture 2d massive Vram leak in UE5 - (tested in UE4 with no problems).](https://forums.unrealengine.com/t/scenecapture-2d-massive-vram-leak-in-ue5-tested-in-ue4-with-no-problems/2701481)
**Author:** [@Poet\_11](https://forums.unrealengine.com/u/Poet_11)\ **Replies:** 1\ **Last updated:** [April 21, 2026, 5:42am UTC](https://forums.unrealengine.com/t/scenecapture-2d-massive-vram-leak-in-ue5-tested-in-ue4-with-no-problems/2701481 "2026-04-21T05:42:29Z")
Hi, I’ve noticed everytime i have a scenecapture2d which is updated in the editor it shoots up the Vram from a typical 5 gb to 16+ crashing my gpu in seconds. The render to texture target is very small in size 128 by 1… --- ## [I seem to have a memory leak except when... wait for it... I'm profiling memory](https://forums.unrealengine.com/t/i-seem-to-have-a-memory-leak-except-when-wait-for-it-im-profiling-memory/488736)
**Author:** [@mmmmGoodDinner](https://forums.unrealengine.com/u/mmmmGoodDinner)\ **Replies:** 1\ **Last updated:** [April 13, 2026, 7:08am UTC](https://forums.unrealengine.com/t/i-seem-to-have-a-memory-leak-except-when-wait-for-it-im-profiling-memory/488736 "2026-04-13T07:08:15Z")
If I package my UE4 game in shipping mode and then run the packaged game, I seem to have a memory leak and it starts going up to the 2000-3000 MB range and sometimes even past 10,000MB! When I deploy my game in developm… --- ## [UnloadLevelInstance Memory Accumulation](https://forums.unrealengine.com/t/unloadlevelinstance-memory-accumulation/2654137)
**Author:** [@chenrongbin](https://forums.unrealengine.com/u/chenrongbin)\ **Replies:** 5\ **Last updated:** [September 8, 2025, 6:30am UTC](https://forums.unrealengine.com/t/unloadlevelinstance-memory-accumulation/2654137 "2025-09-08T06:30:39Z")
I tested LoadLevelInstance and Unload using an empty project. This is the only code in the level instance, and no modifications have been made to the built-in StartContent level. I tested the packages for versions 5.4… --- ## [\[UE 5.5\] Video memory leak when using menu on the top](https://forums.unrealengine.com/t/ue-5-5-video-memory-leak-when-using-menu-on-the-top/2277644)
**Author:** [@Fifens](https://forums.unrealengine.com/u/Fifens)\ **Replies:** 5\ **Last updated:** [August 17, 2025, 1:53pm UTC](https://forums.unrealengine.com/t/ue-5-5-video-memory-leak-when-using-menu-on-the-top/2277644 "2025-08-17T13:53:02Z")
Hi, I have a serious video memory leak issue that makes the editor unusable. The moment I click on the menu on the top (like File, Edit, Window, etc.) and hover my mouse over any of the options, the engine instanlty sta… --- ## [Crash when restarting level out of memory](https://forums.unrealengine.com/t/crash-when-restarting-level-out-of-memory/2299691)
**Author:** [@AndrewFord](https://forums.unrealengine.com/u/AndrewFord)\ **Replies:** 4\ **Last updated:** [January 25, 2025, 11:27am UTC](https://forums.unrealengine.com/t/crash-when-restarting-level-out-of-memory/2299691 "2025-01-25T11:27:34Z")
Hello! My game has a memory overflow and crash every time I restart a level. When loading the level for the first time it consumes 6GB, if I try to load it again immediately, the memory goes to 8GB+. This happens on dif… --- ## [Inability to unload an object from memory](https://forums.unrealengine.com/t/inability-to-unload-an-object-from-memory/2385870)
**Author:** [@blAddddDe](https://forums.unrealengine.com/u/blAddddDe)\ **Replies:** 2\ **Last updated:** [March 12, 2025, 4:00pm UTC](https://forums.unrealengine.com/t/inability-to-unload-an-object-from-memory/2385870 "2025-03-12T16:00:12Z")
Good afternoon/evening/morning. The more I learn about PDA and AssetManager, the faster I go crazy. Today I encountered a new problem: object (Primary Data Asset ) is not unloaded from memory. I run ForceGC and check … --- ## [UE 5.1 iOS Shipping Only Memory Leak](https://forums.unrealengine.com/t/ue-5-1-ios-shipping-only-memory-leak/718253)
**Author:** [@mindblender](https://forums.unrealengine.com/u/mindblender)\ **Replies:** 3\ **Last updated:** [December 17, 2024, 12:02am UTC](https://forums.unrealengine.com/t/ue-5-1-ios-shipping-only-memory-leak/718253 "2024-12-17T00:02:34Z")
Hi fellow developers and awesome people at Epic, I had quite a dev journey today discovering a crash and learned a lot during investigation. So, I’d make a post as well as report this bug. Before all, I’m using UE 5.1 … --- ## [Memory leak while reading UTextureRenderTarget2D pixel data](https://forums.unrealengine.com/t/memory-leak-while-reading-utexturerendertarget2d-pixel-data/2116141)
**Author:** [@e3delyptos](https://forums.unrealengine.com/u/e3delyptos)\ **Replies:** 0\ **Last updated:** [November 11, 2024, 3:07pm UTC](https://forums.unrealengine.com/t/memory-leak-while-reading-utexturerendertarget2d-pixel-data/2116141 "2024-11-11T15:07:30Z")
Hello everyone. In our project we are experiencing a severe memory leak. It seems to happen while reading the pixel data of a render target. We are doing this every frame after capturing the scene with a USceneCaptureCo… --- ## [Memory leak in UE 5.2](https://forums.unrealengine.com/t/memory-leak-in-ue-5-2/1399215)
**Author:** [@MiscellaneousMyth](https://forums.unrealengine.com/u/MiscellaneousMyth)\ **Replies:** 9\ **Last updated:** [July 16, 2024, 12:23am UTC](https://forums.unrealengine.com/t/memory-leak-in-ue-5-2/1399215 "2024-07-16T00:23:03Z")
Hello everyone! Today I’ve been programming for near eight hours straight and noticed something relating to my memory usage. Over the time span my in-use memory went from 3,600mb to 8,700mb. I restarted my editor and it… --- ## [Paper2D Sprite Actor possible memory leak 4.21, 4.20, 4.19](https://forums.unrealengine.com/t/paper2d-sprite-actor-possible-memory-leak-4-21-4-20-4-19/438090)
**Author:** [@anonymous\_user\_97dec44b](https://forums.unrealengine.com/u/anonymous_user_97dec44b)\ **Replies:** 3\ **Last updated:** [May 10, 2024, 6:55pm UTC](https://forums.unrealengine.com/t/paper2d-sprite-actor-possible-memory-leak-4-21-4-20-4-19/438090 "2024-05-10T18:55:34Z")
Hi there, It looks like there may be a memory leak in 4.19 and above (including the latest 4.21.0 release) when using the PaperSpriteActor using a sprite source from a spritesheet. Spawning Paper Sprite Actors into the … --- ## [TextBlock inside RetainerBox causes "Leak Detected" message when containing UUserWidget is moved in the UMG Designer](https://forums.unrealengine.com/t/textblock-inside-retainerbox-causes-leak-detected-message-when-containing-uuserwidget-is-moved-in-the-umg-designer/482997)
**Author:** [@RGARDEN1](https://forums.unrealengine.com/u/RGARDEN1)\ **Replies:** 1\ **Last updated:** [April 9, 2024, 10:54pm UTC](https://forums.unrealengine.com/t/textblock-inside-retainerbox-causes-leak-detected-message-when-containing-uuserwidget-is-moved-in-the-umg-designer/482997 "2024-04-09T22:54:01Z")
I have a minimal project which declares a C++ UUserWidget class called USimpleBase, like this: UCLASS() class MY\_API USimpleBase : public UUserWidget { GENERATED\_BODY() protected: virtual TSharedRef\ Rebuil… --- ## [Add a new custom detail panel, write the default value of UPROPERTY with EditIilineNew](https://forums.unrealengine.com/t/add-a-new-custom-detail-panel-write-the-default-value-of-uproperty-with-editiilinenew/1746978)
**Author:** [@007havegone](https://forums.unrealengine.com/u/007havegone)\ **Replies:** 0\ **Last updated:** [March 12, 2024, 7:29am UTC](https://forums.unrealengine.com/t/add-a-new-custom-detail-panel-write-the-default-value-of-uproperty-with-editiilinenew/1746978 "2024-03-12T07:29:54Z")
I use the plugin UE4-EditorScriptingToolsPlugin(GitHub - HoussineMehnik/UE4-EditorScriptingToolsPlugin: Extend and customize some part the Unreal Editor using Blueprints. The plugin comes with some basic tools samples.) … --- ## [Output with Blackmagic Down Conversion](https://forums.unrealengine.com/t/output-with-blackmagic-down-conversion/753684)
**Author:** [@LYMpro](https://forums.unrealengine.com/u/LYMpro)\ **Replies:** 1\ **Last updated:** [January 8, 2024, 4:37pm UTC](https://forums.unrealengine.com/t/output-with-blackmagic-down-conversion/753684 "2024-01-08T16:37:16Z")
We use Blackmagic Quad 2 for media output. We cannot output SD 50i from Unreal, that’s why we use HD Down Conversion (HD to SD) in Blackmagic Desktop Video Setup. When conversion is applied, Unreal starts leaking memory … --- ## [World Partition Tab causes crash](https://forums.unrealengine.com/t/world-partition-tab-causes-crash/715746)
**Author:** [@GalacticQuokka](https://forums.unrealengine.com/u/GalacticQuokka)\ **Replies:** 1\ **Last updated:** [June 15, 2023, 12:47pm UTC](https://forums.unrealengine.com/t/world-partition-tab-causes-crash/715746 "2023-06-15T12:47:02Z")
Hello, I moved my project from 5.0.3 to 5.1. Everything working as it should, but when im trying to just click on world partition tab, everything freezes. After 1 min i got crash. Someone have idea how to fix that? Cras… --- ## [How resolve the \`Unresolved Allocations\` which is shown in MSVC for Memory Diagnostic?](https://forums.unrealengine.com/t/how-resolve-the-unresolved-allocations-which-is-shown-in-msvc-for-memory-diagnostic/757923)
**Author:** [@FLake2022](https://forums.unrealengine.com/u/FLake2022)\ **Replies:** 0\ **Last updated:** [January 27, 2023, 9:51am UTC](https://forums.unrealengine.com/t/how-resolve-the-unresolved-allocations-which-is-shown-in-msvc-for-memory-diagnostic/757923 "2023-01-27T09:51:32Z")
Hi all, I am trying to figure out memory leak in my game with MSVC plus UE 5.0. In ‘DebugGame’ configuration, most of memory is shown as unresolved allocations when I take a snapshot in VS. The DebugGame Edtior is as w… --- ## [Unreal Engine Editor Memory Leaks In a Specific Condition](https://forums.unrealengine.com/t/unreal-engine-editor-memory-leaks-in-a-specific-condition/753668)
**Author:** [@EpikGeymir](https://forums.unrealengine.com/u/EpikGeymir)\ **Replies:** 2\ **Last updated:** [January 21, 2023, 6:46am UTC](https://forums.unrealengine.com/t/unreal-engine-editor-memory-leaks-in-a-specific-condition/753668 "2023-01-21T06:46:28Z")
Hello there, I’m using Unreal Engine 5.1 on Windows 10. I’m dynamically loading assets for my pawn from a datatable. This itself, doesn’t cause any memleaks. The specific issue happens when in the editor outliner windo… --- ## [High Res Screenshot memory leak / dropped fps](https://forums.unrealengine.com/t/high-res-screenshot-memory-leak-dropped-fps/406912)
**Author:** [@Dodge](https://forums.unrealengine.com/u/Dodge)\ **Replies:** 7\ **Last updated:** [December 28, 2022, 10:57am UTC](https://forums.unrealengine.com/t/high-res-screenshot-memory-leak-dropped-fps/406912 "2022-12-28T10:57:51Z")
After taking a high res screenshot, (only tested at 3 - 6 scale) the FPS in the engine drops well under 10, becomes unusable. Possible memory leak? Can sometimes cause a crash Happened on multiple occasions, scene is he… --- ## [LLM Profiling shows that EngineMisc is leaking memory overtime](https://forums.unrealengine.com/t/llm-profiling-shows-that-enginemisc-is-leaking-memory-overtime/686314)
**Author:** [@Lordontcare](https://forums.unrealengine.com/u/Lordontcare)\ **Replies:** 0\ **Last updated:** [November 8, 2022, 2:57am UTC](https://forums.unrealengine.com/t/llm-profiling-shows-that-enginemisc-is-leaking-memory-overtime/686314 "2022-11-08T02:57:00Z")
This is the llv csv file, LLM\_Pid1520\_2022.11.07-22.47.59\_WindowsServer - 副本.csv (118.0 KB) LLMPlatform\_Pid1520\_2022.11.07-22.47.59\_WindowsServer - 副本.csv (36.3 KB) Additionally, I’m using engine’s json modules and lz… --- ## [Unable to delete HoloLens 2 temporary files after building UE4 project to HoloLens 2 device](https://forums.unrealengine.com/t/unable-to-delete-hololens-2-temporary-files-after-building-ue4-project-to-hololens-2-device/496991)
**Author:** [@MatthewDZane](https://forums.unrealengine.com/u/MatthewDZane)\ **Replies:** 2\ **Last updated:** [August 12, 2022, 5:06pm UTC](https://forums.unrealengine.com/t/unable-to-delete-hololens-2-temporary-files-after-building-ue4-project-to-hololens-2-device/496991 "2022-08-12T17:06:48Z")
I have been building and deploying a UE4 project, which uses OpenCV libraries, to HoloLens 2 device through a direct link cable from my Windows PC. I have noticed that my HoloLens storage space is quickly filling up. Whe… --- ## [\[4.25.2-4\] Why does my memory spike when I try to set the default values of my structures?](https://forums.unrealengine.com/t/4-25-2-4-why-does-my-memory-spike-when-i-try-to-set-the-default-values-of-my-structures/490407)
**Author:** [@Erdrik](https://forums.unrealengine.com/u/Erdrik)\ **Replies:** 1\ **Last updated:** [October 30, 2021, 12:42am UTC](https://forums.unrealengine.com/t/4-25-2-4-why-does-my-memory-spike-when-i-try-to-set-the-default-values-of-my-structures/490407 "2021-10-30T00:42:39Z")
I have a structure that I compiled in C++, and I use it in alot of widgets in the editor. In C++, I recently changed the default values of the variables in the structure, but the changes were not reflected in the editor… --- ## [High Index Buffer Memory](https://forums.unrealengine.com/t/high-index-buffer-memory/446016)
**Author:** [@Finvarraz](https://forums.unrealengine.com/u/Finvarraz)\ **Replies:** 1\ **Last updated:** [October 6, 2021, 8:00am UTC](https://forums.unrealengine.com/t/high-index-buffer-memory/446016 "2021-10-06T08:00:42Z")
After some time in the editor my index buffer memory slowly climbs causing my memory (top right) to climb as well. How can I fix this? I do not even know what index buffer memory is and google/UE4 manual isn’t mentionin… --- ## [Map crashing on load?](https://forums.unrealengine.com/t/map-crashing-on-load/486800)
**Author:** [@EmblaneFilms](https://forums.unrealengine.com/u/EmblaneFilms)\ **Replies:** 0\ **Last updated:** [July 29, 2021, 9:25pm UTC](https://forums.unrealengine.com/t/map-crashing-on-load/486800 "2021-07-29T21:25:56Z")
Hey guys, really hoping for help on this. (UE4.26) I’ve been building a city map the last 6 months. All has been fine with it until a few days ago when I went to work on it… My PC specs: OMEN I7, 3,2 GHZ, 16g ram, 256 … --- ## [Edit Mode Memory Leak](https://forums.unrealengine.com/t/edit-mode-memory-leak/486275)
**Author:** [@roshan\_Ex](https://forums.unrealengine.com/u/roshan_Ex)\ **Replies:** 1\ **Last updated:** [July 19, 2021, 8:16am UTC](https://forums.unrealengine.com/t/edit-mode-memory-leak/486275 "2021-07-19T08:16:20Z")
FSkeletalAnimationTrackEditMode::FSkeletalAnimationTrackEditMode() : bIsTransacting(false) , bManipulatorMadeChange(false) , RootTransform(FTransform::Identity) { FSkeletalAnimationTrackEditModeTool\* EdModeTool = ne… --- ## [MemoryProfiler2](https://forums.unrealengine.com/t/memoryprofiler2/475975)
**Author:** [@anonymous\_user\_8e61df6c](https://forums.unrealengine.com/u/anonymous_user_8e61df6c)\ **Replies:** 1\ **Last updated:** [June 9, 2021, 10:43am UTC](https://forums.unrealengine.com/t/memoryprofiler2/475975 "2021-06-09T10:43:04Z")
Hi, I wanted to check whether MemoryProfiler2 is still supported or in a working state. I cannot get any callstacks out of the captured .mprof files. I rebuilt the MemoryProfiler2 solution as well to make sure. Thanks! --- ## [Removing UPROPERTY TArray with content causes memory leak](https://forums.unrealengine.com/t/removing-uproperty-tarray-with-content-causes-memory-leak/483061)
**Author:** [@XynanXDB](https://forums.unrealengine.com/u/XynanXDB)\ **Replies:** 1\ **Last updated:** [May 7, 2021, 3:45pm UTC](https://forums.unrealengine.com/t/removing-uproperty-tarray-with-content-causes-memory-leak/483061 "2021-05-07T15:45:42Z")
Hi, I have discovered a bug where if you remove an UPROPERTY TArray with content in C++ without manually clearing the content in editor will cause memory leak where the content of TArray will stay referenced by owner. S… --- ## [Memory leaks after opening Session Frontend](https://forums.unrealengine.com/t/memory-leaks-after-opening-session-frontend/479474)
**Author:** [@Babush61](https://forums.unrealengine.com/u/Babush61)\ **Replies:** 1\ **Last updated:** [March 5, 2021, 4:37pm UTC](https://forums.unrealengine.com/t/memory-leaks-after-opening-session-frontend/479474 "2021-03-05T16:37:54Z")
When I open Session Frontend, the editor consumes up to 10 GiB RAM. The message is displayed 2021.02.26-17.07.29 \[QWE100-12164\] 00288.302: LogAutomationTest: Automation Test ‘FBlockStructureSpec’ took \> 10 seconds to… --- ## [Destroying Class instances? (Destroy SaveGame Obj Ref)](https://forums.unrealengine.com/t/destroying-class-instances-destroy-savegame-obj-ref/476315)
**Author:** [@FindingDway](https://forums.unrealengine.com/u/FindingDway)\ **Replies:** 1\ **Last updated:** [December 27, 2020, 7:06pm UTC](https://forums.unrealengine.com/t/destroying-class-instances-destroy-savegame-obj-ref/476315 "2020-12-27T19:06:22Z")
As a coder I understand that when you initialize a class instance, give it a name which is basically a pointer to the instanced data in the memory, and then access it through said reference to interact with it. Once the … [Next page](https://forums.unrealengine.com/tag/memory-leak/9878.md?match_all_tags=true&page=1&tags%5B%5D=memory-leak)