# \#fatal-error **URL:** https://forums.unrealengine.com/tag/fatal-error/6694.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Fatal Error only in packaged version (maybe caused by MetaHumans) ](https://forums.unrealengine.com/t/fatal-error-only-in-packaged-version-maybe-caused-by-metahumans/2731888)
**Author:** [@Fefly\_2](https://forums.unrealengine.com/u/Fefly_2)\ **Replies:** 1\ **Last updated:** [June 27, 2026, 9:54pm UTC](https://forums.unrealengine.com/t/fatal-error-only-in-packaged-version-maybe-caused-by-metahumans/2731888 "2026-06-27T21:54:30Z")
Hi guys, I have really no clue of what’s going on so I hope someone can help me, here is a link to the log I obtained verbose launching the debug version: https://drive.google.com/file/d/1aeEa5UbUkrI2k3LvoBqooZa7nmYom6Y… --- ## [Unreal Engine 5.6.1 Crashes when Opening Level or Setting Performance Settings](https://forums.unrealengine.com/t/unreal-engine-5-6-1-crashes-when-opening-level-or-setting-performance-settings/2690994)
**Author:** [@Bibletech55](https://forums.unrealengine.com/u/Bibletech55)\ **Replies:** 3\ **Last updated:** [January 12, 2026, 7:49pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-6-1-crashes-when-opening-level-or-setting-performance-settings/2690994 "2026-01-12T19:49:17Z")
Unreal Engine 5.6.1 is intermittently crashing when I try to open performance settings or opening a game level. This problem exists for 5.6.0, as I initially had this problem on 5.6.0 and updated to 5.6.1 to try to resol… --- ## [URGENT! I can't open my second Level in the Editor anymore! (Fatal error)](https://forums.unrealengine.com/t/urgent-i-cant-open-my-second-level-in-the-editor-anymore-fatal-error/468713)
**Author:** [@UraniumBonBeurre](https://forums.unrealengine.com/u/UraniumBonBeurre)\ **Replies:** 5\ **Last updated:** [June 30, 2025, 11:48am UTC](https://forums.unrealengine.com/t/urgent-i-cant-open-my-second-level-in-the-editor-anymore-fatal-error/468713 "2025-06-30T11:48:46Z")
Here’s what’s going on. I’m in the “Light” part of my game. After waiting a long time for my lights to be built, I launched my game, and few seconds later UE4 crashed. I didn’t save my project after my Light Build. There… --- ## [Fatal error](https://forums.unrealengine.com/t/fatal-error/2534088)
**Author:** [@Sselective141](https://forums.unrealengine.com/u/Sselective141)\ **Replies:** 1\ **Last updated:** [June 11, 2025, 1:25pm UTC](https://forums.unrealengine.com/t/fatal-error/2534088 "2025-06-11T13:25:52Z")
Hello, friends. I’ve been having problems with my PC, it won’t let me play games that use Unreal Engine. I can play baldurs gate 3, GTA, Rust etc. without any problem. But, when I want to play Marvel Rivals, Oblivion re… --- ## [Standalone works but packaged build has fatal startup error](https://forums.unrealengine.com/t/standalone-works-but-packaged-build-has-fatal-startup-error/377074)
**Author:** [@HuntaKiller](https://forums.unrealengine.com/u/HuntaKiller)\ **Replies:** 14\ **Last updated:** [April 16, 2025, 9:48pm UTC](https://forums.unrealengine.com/t/standalone-works-but-packaged-build-has-fatal-startup-error/377074 "2025-04-16T21:48:53Z")
I can’t seem to figure out why my packaged build does not run. Immediately on startup an error box appears saying “fatal error” with no other information. I’ve tried fresh builds with both development and shipping config… --- ## [Unreal keeps getting crashed while rendering](https://forums.unrealengine.com/t/unreal-keeps-getting-crashed-while-rendering/1717152)
**Author:** [@alifashf](https://forums.unrealengine.com/u/alifashf)\ **Replies:** 12\ **Last updated:** [March 31, 2025, 5:19am UTC](https://forums.unrealengine.com/t/unreal-keeps-getting-crashed-while-rendering/1717152 "2025-03-31T05:19:49Z")
Hey all, I’m working on a personal project in UE 5.3.2 using my PC with R7 3700x and RTX 2060 6GB. I’m trying to render out the scene but the software keeps getting crashed even if I reduce the resolution to 1080p and fo… --- ## [Fatal Error!](https://forums.unrealengine.com/t/fatal-error/1855151)
**Author:** [@WilliamAlex0](https://forums.unrealengine.com/u/WilliamAlex0)\ **Replies:** 2\ **Last updated:** [February 21, 2025, 7:23am UTC](https://forums.unrealengine.com/t/fatal-error/1855151 "2025-02-21T07:23:34Z")
hello i just made a simple Change to the thirdperson Template by adding A Cloner +CubeShape and Effector, and i packed the project and this Fatal Error happened. using UE5.4.1 And the Preview version of Visual Studio… if… --- ## [Hot Reload problem - LINK : fatal error LNK1104: cannot open file Game-DebugGame.dll](https://forums.unrealengine.com/t/hot-reload-problem-link-fatal-error-lnk1104-cannot-open-file-game-debuggame-dll/441355)
**Author:** [@Bionic\_Ape](https://forums.unrealengine.com/u/Bionic_Ape)\ **Replies:** 9\ **Last updated:** [February 17, 2025, 6:15am UTC](https://forums.unrealengine.com/t/hot-reload-problem-link-fatal-error-lnk1104-cannot-open-file-game-debuggame-dll/441355 "2025-02-17T06:15:52Z")
Hi, I can’t hot reload my Project. The error that I get is fatal error LNK1104: cannot open file 'C:\\ProjectPath\\Binaries\\Win64\\UE4Editor-MyGame-Win64-DebugGame.dll'. It’s only happening when I use the solution configu… --- ## [Fatal Error on HTTP Request in Export (Works in Viewport)](https://forums.unrealengine.com/t/fatal-error-on-http-request-in-export-works-in-viewport/2212871)
**Author:** [@DeborahSivolella](https://forums.unrealengine.com/u/DeborahSivolella)\ **Replies:** 2\ **Last updated:** [December 13, 2024, 9:40am UTC](https://forums.unrealengine.com/t/fatal-error-on-http-request-in-export-works-in-viewport/2212871 "2024-12-13T09:40:08Z")
Hi everyone! I’m experiencing an issue with my project in Unreal Engine 5.1, and I’m hoping someone here can help me figure it out. Goal: I’m trying to send JSON data to a server using an HTTP POST request. Works in V… --- ## [Fatal error: \[File:D:\\build\\++UE5\\Sync\\Engine\\Source\\Runtime\\Core\\Private\\GenericPlatform\\GenericPlatformMemory.cpp\] \[Line: 241\] Ran out of memory when saving matrix large city demo map](https://forums.unrealengine.com/t/fatal-error-file-build-ue5-sync-engine-source-runtime-core-private-genericplatform-genericplatformmemory-cpp-line-241-ran-out-of-memory-when-saving-matrix-large-city-demo-map/1164163)
**Author:** [@renderqueen13](https://forums.unrealengine.com/u/renderqueen13)\ **Replies:** 6\ **Last updated:** [November 22, 2024, 1:36am UTC](https://forums.unrealengine.com/t/fatal-error-file-build-ue5-sync-engine-source-runtime-core-private-genericplatform-genericplatformmemory-cpp-line-241-ran-out-of-memory-when-saving-matrix-large-city-demo-map/1164163 "2024-11-22T01:36:58Z")
I keep getting Fatal error: \[File:D:\\build++UE5\\Sync\\Engine\\Source\\Runtime\\Core\\Private\\GenericPlatform\\GenericPlatformMemory.cpp\] \[Line: 241\] Ran out of memory allocating 22369620 bytes with alignment 0. Last error msg:… --- ## [Garbage collection, creating UObject while collecting garbage is not allowed](https://forums.unrealengine.com/t/garbage-collection-creating-uobject-while-collecting-garbage-is-not-allowed/2051311)
**Author:** [@Elites94](https://forums.unrealengine.com/u/Elites94)\ **Replies:** 1\ **Last updated:** [October 4, 2024, 8:36am UTC](https://forums.unrealengine.com/t/garbage-collection-creating-uobject-while-collecting-garbage-is-not-allowed/2051311 "2024-10-04T08:36:32Z")
Hello, I have an issue with garbage collection and I would like to know how I can find what is causing that… I have a game server in 4.26, and the fatal error “Creating UObjects while Collecting Garbage is not allowed!… --- ## [Editor freeze and crash after clicking on the Content Browser](https://forums.unrealengine.com/t/editor-freeze-and-crash-after-clicking-on-the-content-browser/473820)
**Author:** [@Danimate](https://forums.unrealengine.com/u/Danimate)\ **Replies:** 5\ **Last updated:** [September 17, 2024, 2:47am UTC](https://forums.unrealengine.com/t/editor-freeze-and-crash-after-clicking-on-the-content-browser/473820 "2024-09-17T02:47:46Z")
I’ve been using UE4 for more than two years now, and since yesterday the Editor keeps on freezing and dying on me, weirdly only when I click on the Content Browser window. I’m running UE4 in a 1 TB Samsung SSD 2.5" that … --- ## [I hate UEFN](https://forums.unrealengine.com/t/i-hate-uefn/1791499)
**Author:** [@MrFusion1475](https://forums.unrealengine.com/u/MrFusion1475)\ **Replies:** 2\ **Last updated:** [April 8, 2024, 5:06am UTC](https://forums.unrealengine.com/t/i-hate-uefn/1791499 "2024-04-08T05:06:16Z")
THIS IS ALL ABOUT ERRORS IN VERSE AND UEFN I MADE A COPY PASTE OF EVERY CODE TO VERSE IT DIDNT WORK AND THE SUPPORT TEAM IS DISGUSTING AND UEFN SESION IS BROKEN I HAD GREAT IDEAS FOR MAPS THEN UEFN SAID NAH FIRSTLY, I WA… --- ## [Engine crashs randomly with Assertion failed.. when just closing any Blueprint](https://forums.unrealengine.com/t/engine-crashs-randomly-with-assertion-failed-when-just-closing-any-blueprint/1761176)
**Author:** [@BDC\_Patrick](https://forums.unrealengine.com/u/BDC_Patrick)\ **Replies:** 1\ **Last updated:** [March 22, 2024, 2:52pm UTC](https://forums.unrealengine.com/t/engine-crashs-randomly-with-assertion-failed-when-just-closing-any-blueprint/1761176 "2024-03-22T14:52:27Z")
Since 5.3 I got the Problem, that the whole Editor crashes fatally with this Error: LoginId:5e2c7109436d056ad49530a6393c8e42 EpicAccountId:5d02987cf41f4199a7111db08716aee2 Assertion failed: IsValid() \[File:D:\\build\\++U… --- ## [All Unreal Engine' game crash at startup : Fatal Error](https://forums.unrealengine.com/t/all-unreal-engine-game-crash-at-startup-fatal-error/487029)
**Author:** [@Sad1que](https://forums.unrealengine.com/u/Sad1que)\ **Replies:** 2\ **Last updated:** [March 2, 2024, 2:33pm UTC](https://forums.unrealengine.com/t/all-unreal-engine-game-crash-at-startup-fatal-error/487029 "2024-03-02T14:33:16Z")
Hello, Since 3 days, I’m searching to resolve crash issues on all UE4 games, for exemple Mordhau or Valorant. When I launch a game it instantly shutdown and I get the “Fatal Error” message. Here some usefull informatio… --- ## [Fatal Error when trying to open project level](https://forums.unrealengine.com/t/fatal-error-when-trying-to-open-project-level/1704246)
**Author:** [@kander20](https://forums.unrealengine.com/u/kander20)\ **Replies:** 4\ **Last updated:** [February 22, 2024, 5:23pm UTC](https://forums.unrealengine.com/t/fatal-error-when-trying-to-open-project-level/1704246 "2024-02-22T17:23:25Z")
\[2024.02.21-17.26.43:734\]\[857\]LogWindows: Error: appError called: Fatal error: \[File:D:\\build++UE5\\Sync\\Engine\\Source\\Runtime\\CoreUObject\\Private\\Templates\\Casts.cpp\] \[Line: 10\] Cast of Actor /Game/Castle.Castle:Persist… --- ## [BLUEPRINT causes memory issue and crash?](https://forums.unrealengine.com/t/blueprint-causes-memory-issue-and-crash/1636784)
**Author:** [@Cronoss95](https://forums.unrealengine.com/u/Cronoss95)\ **Replies:** 0\ **Last updated:** [January 23, 2024, 3:29pm UTC](https://forums.unrealengine.com/t/blueprint-causes-memory-issue-and-crash/1636784 "2024-01-23T15:29:19Z")
Hi! So, for days now I am trying to figure out why my project is crashing in the most random gameplay moments of my project. The packaging works fine and I now used the Insights and Visual Studio debugger to see if I ha… --- ## [How to fix deletion of PreviewShadowIndicatorMaterial](https://forums.unrealengine.com/t/how-to-fix-deletion-of-previewshadowindicatormaterial/472918)
**Author:** [@MinusJustin](https://forums.unrealengine.com/u/MinusJustin)\ **Replies:** 1\ **Last updated:** [December 15, 2023, 7:47pm UTC](https://forums.unrealengine.com/t/how-to-fix-deletion-of-previewshadowindicatormaterial/472918 "2023-12-15T19:47:28Z")
Hey guys, I deleted the PreviewShadowIndicator Material from the Engine Content → Editor Materials folder and now the engine crashes every time I try to open up the project. Here’s the error message: Fatal error: \[File… --- ## [Fatal error C1060: compiler is out of heap space while compilimg sources](https://forums.unrealengine.com/t/fatal-error-c1060-compiler-is-out-of-heap-space-while-compilimg-sources/367880)
**Author:** [@anonymous\_user\_c91f08fc](https://forums.unrealengine.com/u/anonymous_user_c91f08fc)\ **Replies:** 5\ **Last updated:** [October 12, 2023, 5:35pm UTC](https://forums.unrealengine.com/t/fatal-error-c1060-compiler-is-out-of-heap-space-while-compilimg-sources/367880 "2023-10-12T17:35:55Z")
I am trying to compiling UE4 source code with visual studio2015 (upd2) . Win8 -64bit 10G Ram, total ram usage\<70%. What to do with this problem? --- ## [Game Runs But Packaged File Get Fatal Error](https://forums.unrealengine.com/t/game-runs-but-packaged-file-get-fatal-error/450744)
**Author:** [@DeadStudios](https://forums.unrealengine.com/u/DeadStudios)\ **Replies:** 1\ **Last updated:** [September 19, 2023, 6:18am UTC](https://forums.unrealengine.com/t/game-runs-but-packaged-file-get-fatal-error/450744 "2023-09-19T06:18:07Z")
Log And Crash Reports Below Can Anyone Help Log file open, 06/15/19 21:14:34 LogWindows: Failed to load 'aqProf.dll' (GetLastError=126) LogWindows: File 'aqProf.dll' does not exist LogWindows: Failed to load 'VtuneApi.d… --- ## [Fatal error loading map](https://forums.unrealengine.com/t/fatal-error-loading-map/1238470)
**Author:** [@TTGR.Pro](https://forums.unrealengine.com/u/TTGR.Pro)\ **Replies:** 0\ **Last updated:** [July 24, 2023, 11:11am UTC](https://forums.unrealengine.com/t/fatal-error-loading-map/1238470 "2023-07-24T11:11:14Z")
Hey so I am getting a Fatal Error when loading my lobby map and need help fixing it. So my maps go like this Main Menu → Lobby Map → (Playable Levels 1-5) Loading from one to the other is fine but when I execute \[serv… --- ## [Fatal error: Line:221 \[File:D:\\build\\++UE5\\Sync\\Engine\\Source\\Runtime\\Core\\Private\\GenericPlatform\\GenericPlatformMemory.cpp\]](https://forums.unrealengine.com/t/fatal-error-line-221-file-build-ue5-sync-engine-source-runtime-core-private-genericplatform-genericplatformmemory-cpp/722544)
**Author:** [@nscena](https://forums.unrealengine.com/u/nscena)\ **Replies:** 3\ **Last updated:** [June 1, 2023, 3:54am UTC](https://forums.unrealengine.com/t/fatal-error-line-221-file-build-ue5-sync-engine-source-runtime-core-private-genericplatform-genericplatformmemory-cpp/722544 "2023-06-01T03:54:55Z")
Please help me! :melting\_face: Unreal keeps on crashing after rendering one camera. It started after I had rendered many other images! So, it’s not like the problem was there from the beginning. I have no idea of progr… --- ## [Start AR Session fails on Galaxy S21+](https://forums.unrealengine.com/t/start-ar-session-fails-on-galaxy-s21/488515)
**Author:** [@NotADesigner](https://forums.unrealengine.com/u/NotADesigner)\ **Replies:** 3\ **Last updated:** [May 10, 2023, 7:18am UTC](https://forums.unrealengine.com/t/start-ar-session-fails-on-galaxy-s21/488515 "2023-05-10T07:18:07Z")
I’m trying this on a Samsung Galaxy S21+, I have the ARCore system stuff installed on my device. Other ARCore tools (like Measure) work properly. The blueprint node “Start AR Session” is called and later when I check th… --- ## [Games with UE4 crashing](https://forums.unrealengine.com/t/games-with-ue4-crashing/488614)
**Author:** [@JorahDasAndal](https://forums.unrealengine.com/u/JorahDasAndal)\ **Replies:** 3\ **Last updated:** [May 4, 2023, 12:46am UTC](https://forums.unrealengine.com/t/games-with-ue4-crashing/488614 "2023-05-04T00:46:08Z")
I’m not an UE4 user, let’s start with that. I’ve just been experiencing crashes with games that run on UE4, every game that I’ve got running on UE4 CTDs after a few minutes. These are Insurgency: Sandstorm and Post Scr… --- ## [Erro Durante a Instalaçao 0x80070643](https://forums.unrealengine.com/t/erro-durante-a-instalacao-0x80070643/422569)
**Author:** [@anonymous\_user\_2bfd48741](https://forums.unrealengine.com/u/anonymous_user_2bfd48741)\ **Replies:** 1\ **Last updated:** [April 17, 2023, 7:20am UTC](https://forums.unrealengine.com/t/erro-durante-a-instalacao-0x80070643/422569 "2023-04-17T07:20:33Z")
Eu tenho o Sistema 64 bits Porem esta Dando este erro Ao instalar 0x80070643 agora so posso recorrer a vocês --- ## ['No outstanding IO, no nodes in the queue...' Packaged Game Crash -](https://forums.unrealengine.com/t/no-outstanding-io-no-nodes-in-the-queue-packaged-game-crash/444637)
**Author:** [@Akyton](https://forums.unrealengine.com/u/Akyton)\ **Replies:** 4\ **Last updated:** [January 19, 2023, 12:45am UTC](https://forums.unrealengine.com/t/no-outstanding-io-no-nodes-in-the-queue-packaged-game-crash/444637 "2023-01-19T00:45:20Z")
I’ve got the ‘No outstanding IO, no nodes in the queue…’ fatal crash when I try to start up my packaged game. \[2019.03.05-06.11.56:444\]\[ 0\]LogWindows: Error: Fatal error: \[File:D:\\Build\\++UE4\\Sync\\Engine\\Source\\Runtim… --- ## [Cook failure after upgrading from 4.23 to 4.26.1](https://forums.unrealengine.com/t/cook-failure-after-upgrading-from-4-23-to-4-26-1/478765)
**Author:** [@GG-Aidan](https://forums.unrealengine.com/u/GG-Aidan)\ **Replies:** 2\ **Last updated:** [November 8, 2022, 3:16pm UTC](https://forums.unrealengine.com/t/cook-failure-after-upgrading-from-4-23-to-4-26-1/478765 "2022-11-08T15:16:25Z")
Hi everyone, I recently started porting our project to 4.26.1 from 4.23, and each time we try to cook, we get a variation of the following error: Trying to remove MovieSceneNodeGroupCollection None.TP\_Sequenced\_Boss\_Na… --- ## [Cooking Fails: BulkData compressed header](https://forums.unrealengine.com/t/cooking-fails-bulkdata-compressed-header/483029)
**Author:** [@Apple\_Aiden](https://forums.unrealengine.com/u/Apple_Aiden)\ **Replies:** 2\ **Last updated:** [July 30, 2022, 2:00pm UTC](https://forums.unrealengine.com/t/cooking-fails-bulkdata-compressed-header/483029 "2022-07-30T14:00:18Z")
Crash Report found here, primarily using some assets and the UATHelper: Cooking (Windows (64-bit)): LogThreadingWindows: Error: Runnable thread PoolThread 16 crashed. UATHelper: Cooking (Windows (64-bit)): LogWindow… --- ## [Low Level Fatal Error](https://forums.unrealengine.com/t/low-level-fatal-error/487527)
**Author:** [@Ocasoblack](https://forums.unrealengine.com/u/Ocasoblack)\ **Replies:** 10\ **Last updated:** [July 28, 2022, 5:59am UTC](https://forums.unrealengine.com/t/low-level-fatal-error/487527 "2022-07-28T05:59:32Z")
I upgraded my project from 4.24 to 4.26. My shipping build was running good with ver 24. but once I switched engine this error began to occur No idea what is happening. The game runs good but randomly after some few m… --- ## [Specific project keeps crashing on launch \[MAC OS ONLY\]](https://forums.unrealengine.com/t/specific-project-keeps-crashing-on-launch-mac-os-only/487676)
**Author:** [@yhcoKx](https://forums.unrealengine.com/u/yhcoKx)\ **Replies:** 1\ **Last updated:** [June 22, 2022, 6:28am UTC](https://forums.unrealengine.com/t/specific-project-keeps-crashing-on-launch-mac-os-only/487676 "2022-06-22T06:28:12Z")
The question name states it clearly. I am working on this project with source control which is worked on a Windows machine as well. My colleague on PC has no problems, but it just keeps crashing on startup on my MacBook … [Next page](https://forums.unrealengine.com/tag/fatal-error/6694.md?match_all_tags=true&page=1&tags%5B%5D=fatal-error)