# \#compile **URL:** https://forums.unrealengine.com/tag/compile/617.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [\[43.00\] (Random?) Adding an event to a widget fails, errors out and breaks that UMG forever](https://forums.unrealengine.com/t/43-00-random-adding-an-event-to-a-widget-fails-errors-out-and-breaks-that-umg-forever/2851792)
**Author:** [@Christoufu](https://forums.unrealengine.com/u/Christoufu)\ **Replies:** 0\ **Last updated:** [November 7, 2026, 4:03am UTC](https://forums.unrealengine.com/t/43-00-random-adding-an-event-to-a-widget-fails-errors-out-and-breaks-that-umg-forever/2851792 "2026-11-07T04:03:58Z")
Summary I got to a weird state where I could not add any new event into a UMG I could add standard vars (bool) with no error, but whenever I added an event, UMG would fail compile and I would get those: LogBlueprint: C… --- ## [Giovanelli Precompiler & Loading Screen PSO](https://forums.unrealengine.com/t/giovanelli-precompiler-loading-screen-pso/2731800)
**Author:** [@Giovanelli](https://forums.unrealengine.com/u/Giovanelli)\ **Replies:** 0\ **Last updated:** [June 26, 2026, 11:21pm UTC](https://forums.unrealengine.com/t/giovanelli-precompiler-loading-screen-pso/2731800 "2026-06-26T23:21:55Z")
:rocket: About the Plugin Have you ever played an Unreal Engine title that stutters every time a new effect appears on screen? That is the dreaded Shader Compilation Stuttering. The Giovanelli Precompiler is an AAA-l… --- ## [What causes "excluded from unity build"?](https://forums.unrealengine.com/t/what-causes-excluded-from-unity-build/442332)
**Author:** [@byg\_ben](https://forums.unrealengine.com/u/byg_ben)\ **Replies:** 8\ **Last updated:** [June 23, 2026, 2:06am UTC](https://forums.unrealengine.com/t/what-causes-excluded-from-unity-build/442332 "2026-06-23T02:06:13Z")
I’m using wwise and I’ve noticed in the last few months, my compile times suddenly got a lot longer. Every time I compile, I get the following message: 2\>\[Adaptive unity build\] Disabling PCH for excluded files. Set bAd… --- ## [Obtaining paths for includes and directives from the UBT ](https://forums.unrealengine.com/t/obtaining-paths-for-includes-and-directives-from-the-ubt/2708965)
**Author:** [@MM\_GabeSventek](https://forums.unrealengine.com/u/MM_GabeSventek)\ **Replies:** 0\ **Last updated:** [March 26, 2026, 12:04am UTC](https://forums.unrealengine.com/t/obtaining-paths-for-includes-and-directives-from-the-ubt/2708965 "2026-03-26T00:04:25Z")
Hello, we are working on a project where we need to obtain all of the includes and directives for the title. Is it possible to obtain the includes paths and preprocessor directives for each source file from UBT? --- ## [Issue with changing version of plugin](https://forums.unrealengine.com/t/issue-with-changing-version-of-plugin/2681043)
**Author:** [@TBS\_SplAsh](https://forums.unrealengine.com/u/TBS_SplAsh)\ **Replies:** 4\ **Last updated:** [December 3, 2025, 12:51pm UTC](https://forums.unrealengine.com/t/issue-with-changing-version-of-plugin/2681043 "2025-12-03T12:51:41Z")
I have a question about compiling a plugin - the last supported version of it was 5.3, I want to move it to 5.6 anyone have any experience with that? I genuinely can’t seem to find the issue. This is the plugin - GitH… --- ## [Why am I receiving an error when trying to compile in VS (C1001, MSB3073)?](https://forums.unrealengine.com/t/why-am-i-receiving-an-error-when-trying-to-compile-in-vs-c1001-msb3073/278882)
**Author:** [@anonymous\_user\_58b2d59d](https://forums.unrealengine.com/u/anonymous_user_58b2d59d)\ **Replies:** 10\ **Last updated:** [December 2, 2025, 2:57pm UTC](https://forums.unrealengine.com/t/why-am-i-receiving-an-error-when-trying-to-compile-in-vs-c1001-msb3073/278882 "2025-12-02T14:57:03Z")
1-Windows 8.1 / x64 Pro, Intel core i5 2.53GHz, 8 GB RAM. 2- VS 2013 ultimate. 3- Build Platform ( Win x64 ) UE 4 I received the following Error: ( C1001, MSB3073 ) Error List \*\* Error 1 error C1001: An internal e… --- ## [State Tree Crashing Engine On Compilation](https://forums.unrealengine.com/t/state-tree-crashing-engine-on-compilation/2543529)
**Author:** [@Zapking9224](https://forums.unrealengine.com/u/Zapking9224)\ **Replies:** 2\ **Last updated:** [August 9, 2025, 7:10pm UTC](https://forums.unrealengine.com/t/state-tree-crashing-engine-on-compilation/2543529 "2025-08-09T19:10:09Z")
Hi, So I’m having an issue where I have a state tree and I want to see if the enemy’s (the context actor) distance to the player is between 700 and 1000. The condition works fine if I put in just one condition for if it… --- ## [\[UE5.6 Upgrade\] Build Error Including ScenePrivate.h — Missing 'TranslucentPassResource.h](https://forums.unrealengine.com/t/ue5-6-upgrade-build-error-including-sceneprivate-h-missing-translucentpassresource-h/2544308)
**Author:** [@X-perto](https://forums.unrealengine.com/u/X-perto)\ **Replies:** 3\ **Last updated:** [June 24, 2025, 10:19am UTC](https://forums.unrealengine.com/t/ue5-6-upgrade-build-error-including-sceneprivate-h-missing-translucentpassresource-h/2544308 "2025-06-24T10:19:51Z")
I’m upgrading a project from Unreal Engine 5.5 to 5.6, and I’m running into a compiler error when including ScenePrivate.h: MeshDrawCommands.h(10,1): error C1083: Cannot open include file: ‘TranslucentPassResource.h’: … --- ## [\[UE5.6 Upgrade\] Error including ScenePrivate.h — Missing 'TranslucentPassResource.h'](https://forums.unrealengine.com/t/ue5-6-upgrade-error-including-sceneprivate-h-missing-translucentpassresource-h/2544304)
**Author:** [@X-perto](https://forums.unrealengine.com/u/X-perto)\ **Replies:** 1\ **Last updated:** [June 24, 2025, 7:46am UTC](https://forums.unrealengine.com/t/ue5-6-upgrade-error-including-sceneprivate-h-missing-translucentpassresource-h/2544304 "2025-06-24T07:46:31Z")
Hey all, I’m upgrading a project from Unreal Engine 5.5 to 5.6, and I’m hitting a compiler error when trying to include ScenePrivate.h: MeshDrawCommands.h(10,1): error C1083: Cannot open include file: 'TranslucentPassR… --- ## [NDI compiled proyect won´t open.](https://forums.unrealengine.com/t/ndi-compiled-proyect-won-t-open/1291259)
**Author:** [@Aurelian24](https://forums.unrealengine.com/u/Aurelian24)\ **Replies:** 2\ **Last updated:** [June 24, 2025, 1:26am UTC](https://forums.unrealengine.com/t/ndi-compiled-proyect-won-t-open/1291259 "2025-06-24T01:26:49Z")
Hello everyone ! So im making an unreal engine proyect for VJING and i need it to have an NDI output for mixing it in other softwares. The plugin works perfectly inside the editor, the problem is when i tryed to compile… --- ## [Why Source files are created in intermediate folder? ](https://forums.unrealengine.com/t/why-source-files-are-created-in-intermediate-folder/2486272)
**Author:** [@EuiHyeon](https://forums.unrealengine.com/u/EuiHyeon)\ **Replies:** 0\ **Last updated:** [May 2, 2025, 4:06am UTC](https://forums.unrealengine.com/t/why-source-files-are-created-in-intermediate-folder/2486272 "2025-05-02T04:06:24Z")
Hello. I have some problem. The problem is that source files(##.target.cs, #editor.target.cs etc..) is created at intermediate folder when compile by visual studio. resultly, ‘Target.cs at my project source folder’ and ‘… --- ## [Error C4668: 'NDIS\_MINIPORT\_MAJOR\_VERSION' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif'](https://forums.unrealengine.com/t/error-c4668-ndis-miniport-major-version-is-not-defined-as-a-preprocessor-macro-replacing-with-0-for-if-elif/454584)
**Author:** [@Xaymar](https://forums.unrealengine.com/u/Xaymar)\ **Replies:** 5\ **Last updated:** [March 21, 2025, 2:24pm UTC](https://forums.unrealengine.com/t/error-c4668-ndis-miniport-major-version-is-not-defined-as-a-preprocessor-macro-replacing-with-0-for-if-elif/454584 "2025-03-21T14:24:29Z")
When Windows SDK 10.0.18362.0 is installed, the build tools for Unreal Engine 4 automatically pick it, even though the actual code does not seem to be fully compatible with the SDK version. Even if other Windows SDKs are… --- ## [How to hide shaders code when deliverying a plugin](https://forums.unrealengine.com/t/how-to-hide-shaders-code-when-deliverying-a-plugin/1293320)
**Author:** [@Tencent](https://forums.unrealengine.com/u/Tencent)\ **Replies:** 7\ **Last updated:** [February 20, 2025, 7:09am UTC](https://forums.unrealengine.com/t/how-to-hide-shaders-code-when-deliverying-a-plugin/1293320 "2025-02-20T07:09:06Z")
My plugin contains a butch of compute shaders (usf & ush), I would like to delivery it to other colleagues, but i want hide or encrypt the shader part because it contains some core calculations, so what should I do and t… --- ## [Which WebRTC's Version should I compile of UE4.27?](https://forums.unrealengine.com/t/which-webrtcs-version-should-i-compile-of-ue4-27/2077134)
**Author:** [@AndrasChen](https://forums.unrealengine.com/u/AndrasChen)\ **Replies:** 1\ **Last updated:** [January 5, 2025, 4:47am UTC](https://forums.unrealengine.com/t/which-webrtcs-version-should-i-compile-of-ue4-27/2077134 "2025-01-05T04:47:53Z")
I want to recompile the UE4.27 to running at arch=aarch64 Linux. Yesterday, I compiled a libwebrtc.a, but the version is branch-heads/4896. I got the error “duplicate symbol: BIO\_new,” between “Openssl 1.1.1c / libcrypto… --- ## [InstalledBuild doesn't create LocalBuilds folder](https://forums.unrealengine.com/t/installedbuild-doesnt-create-localbuilds-folder/406928)
**Author:** [@anonymous\_user\_c091fbdb](https://forums.unrealengine.com/u/anonymous_user_c091fbdb)\ **Replies:** 5\ **Last updated:** [December 25, 2024, 2:45pm UTC](https://forums.unrealengine.com/t/installedbuild-doesnt-create-localbuilds-folder/406928 "2024-12-25T14:45:08Z")
I am trying to make an InstalledBuild using the directions here - https://docs.unrealengine.com/latest/INT/Programming/Development/InstalledBuildReference/index.html http://jackknobel.com/BuildGraph/Building-an-install… --- ## [New plugin folder doesn't appear in Solution Explorer](https://forums.unrealengine.com/t/new-plugin-folder-doesnt-appear-in-solution-explorer/375316)
**Author:** [@Motanum](https://forums.unrealengine.com/u/Motanum)\ **Replies:** 2\ **Last updated:** [December 4, 2024, 3:12pm UTC](https://forums.unrealengine.com/t/new-plugin-folder-doesnt-appear-in-solution-explorer/375316 "2024-12-04T15:12:18Z")
Hello, I just managed to compile the engine from the Github source code. However, befopre moving my project to this new verison, I need to add a plug in I got from the marketplace, as my project makes heavy sue of that … --- ## [Unable to compile blank project](https://forums.unrealengine.com/t/unable-to-compile-blank-project/1214010)
**Author:** [@Nickmav1337](https://forums.unrealengine.com/u/Nickmav1337)\ **Replies:** 9\ **Last updated:** [October 9, 2024, 4:06pm UTC](https://forums.unrealengine.com/t/unable-to-compile-blank-project/1214010 "2024-10-09T16:06:03Z")
I have a new UE 5.2 blank project that I am unable to compile in Visual Studio. The errors are all in read-only source files and I have done literally nothing the blank project. Can someone explain how there can be err… --- ## [cross compile, is the gcc(4.8.5) version too old for most of c++ thirdparty?](https://forums.unrealengine.com/t/cross-compile-is-the-gcc-4-8-5-version-too-old-for-most-of-c-thirdparty/1270583)
**Author:** [@lleeaarr](https://forums.unrealengine.com/u/lleeaarr)\ **Replies:** 1\ **Last updated:** [September 3, 2024, 10:45pm UTC](https://forums.unrealengine.com/t/cross-compile-is-the-gcc-4-8-5-version-too-old-for-most-of-c-thirdparty/1270583 "2024-09-03T22:45:20Z")
When cross compile in Linux with Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux\_x64/v20\_clang-13.0.1-centos7/x86\_64-unknown-linux-gnu/bin/clang++, the gcc(4.8.5) version is too old for most c++ thirdparty now. #./cl… --- ## [Cannot compile unreal engine 4 c++ project with vistual studio 2017](https://forums.unrealengine.com/t/cannot-compile-unreal-engine-4-c-project-with-vistual-studio-2017/432620)
**Author:** [@anonymous\_user\_6450b452](https://forums.unrealengine.com/u/anonymous_user_6450b452)\ **Replies:** 2\ **Last updated:** [July 14, 2024, 11:00am UTC](https://forums.unrealengine.com/t/cannot-compile-unreal-engine-4-c-project-with-vistual-studio-2017/432620 "2024-07-14T11:00:37Z")
I created a c++ project in unreal engine 4.20.2.Then,I got an error said no projectname.dll finded and i should compile manully with visual studio 2017.When i start my compilation with vs2017 i got 1 waring and 3 errors: … --- ## [Stuck at compiling code for long time for no reason](https://forums.unrealengine.com/t/stuck-at-compiling-code-for-long-time-for-no-reason/1823160)
**Author:** [@nbtthief](https://forums.unrealengine.com/u/nbtthief)\ **Replies:** 0\ **Last updated:** [April 26, 2024, 4:35pm UTC](https://forums.unrealengine.com/t/stuck-at-compiling-code-for-long-time-for-no-reason/1823160 "2024-04-26T16:35:55Z")
Hi Everyone, I’m using Rider and having issue like this. Sometimes my editor just stuck at compiling, nothing happen (no CPU or RAM is increased. Just stuck at the line “action start” CONSOLE: L:\\UnrealEngine\\UE\_5.3\\En… --- ## [CompilerResultsLog: ERROR: Expecting to find a type to be declared in a module rules named 'AdvancedSessions'](https://forums.unrealengine.com/t/compilerresultslog-error-expecting-to-find-a-type-to-be-declared-in-a-module-rules-named-advancedsessions/468583)
**Author:** [@LatteTheDev](https://forums.unrealengine.com/u/LatteTheDev)\ **Replies:** 22\ **Last updated:** [February 21, 2024, 4:19pm UTC](https://forums.unrealengine.com/t/compilerresultslog-error-expecting-to-find-a-type-to-be-declared-in-a-module-rules-named-advancedsessions/468583 "2024-02-21T16:19:22Z")
After simply updating from 4.25.1 → 4.25.2 I am now getting this error when I try to compile CompilerResultsLog: ERROR: Expecting to find a type to be declared in a module rules named 'AdvancedSessions' in UE4Rules, Ver… --- ## [Compile of ue 5.3.2 source on GitHub (release) failing](https://forums.unrealengine.com/t/compile-of-ue-5-3-2-source-on-github-release-failing/1656952)
**Author:** [@neighborlee](https://forums.unrealengine.com/u/neighborlee)\ **Replies:** 1\ **Last updated:** [January 31, 2024, 11:14pm UTC](https://forums.unrealengine.com/t/compile-of-ue-5-3-2-source-on-github-release-failing/1656952 "2024-01-31T23:14:45Z")
Unable to open settings file /Users/stevenwoods/UnrealEngine/UnrealTrace/Settings.ini. That is error I get from Xcode 15.2 compile attempt on M1 Max 32gb. Looking for ideas where I went wrong, or if its an issue atm ? … --- ## [HotReload Problem](https://forums.unrealengine.com/t/hotreload-problem/481083)
**Author:** [@ACBYTES](https://forums.unrealengine.com/u/ACBYTES)\ **Replies:** 3\ **Last updated:** [April 3, 2021, 7:43am UTC](https://forums.unrealengine.com/t/hotreload-problem/481083 "2021-04-03T07:43:07Z")
After each compilation on my code, 1: No hot-reload happens. (I’ve tried everything, load code editor after engine, before engine, using engine, etc…) 2: C++ scripts attached to Blueprint classes face and error because… --- ## [Compile error '\_InterlockedCompareExchange': is not a member of 'FWindowsPlatformAtomics'](https://forums.unrealengine.com/t/compile-error-interlockedcompareexchange-is-not-a-member-of-fwindowsplatformatomics/487468)
**Author:** [@kssidhu7](https://forums.unrealengine.com/u/kssidhu7)\ **Replies:** 1\ **Last updated:** [November 10, 2023, 5:37pm UTC](https://forums.unrealengine.com/t/compile-error-interlockedcompareexchange-is-not-a-member-of-fwindowsplatformatomics/487468 "2023-11-10T17:37:29Z")
Hi I’m stuck trying to compile my project with an error it looks like something to do with Chaos. My project was originally 4.25 and I had added chaos manually. Now all references that I can tell are removed, .uproject … --- ## [How do fix the error "could not be compiled. Try rebuilding from the source manually"](https://forums.unrealengine.com/t/how-do-fix-the-error-could-not-be-compiled-try-rebuilding-from-the-source-manually/479698)
**Author:** [@Olezka06](https://forums.unrealengine.com/u/Olezka06)\ **Replies:** 6\ **Last updated:** [September 25, 2023, 12:30am UTC](https://forums.unrealengine.com/t/how-do-fix-the-error-could-not-be-compiled-try-rebuilding-from-the-source-manually/479698 "2023-09-25T00:30:53Z")
Hello everyone, IM doing an Unreal Engine 4 tutorial series and I’m instructed to open their game but whenever I open it, I get the error of “BullCowGame could not be compiled. Try rebuilding from the source manually.” W… --- ## [Adding Custom Android Activity Java File](https://forums.unrealengine.com/t/adding-custom-android-activity-java-file/282844)
**Author:** [@pal\_2](https://forums.unrealengine.com/u/pal_2)\ **Replies:** 5\ **Last updated:** [September 15, 2023, 10:09am UTC](https://forums.unrealengine.com/t/adding-custom-android-activity-java-file/282844 "2023-09-15T10:09:01Z")
The engine uses GameActivity.java found at (Engien\\Build\\Android\\Java\\src\\com\\epicgames\\ue4) as the android activity when launching the application (referred to inside AndroidMenifest.xml) and places it inside your proje… --- ## [Crash on compile Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0x0000000000000138](https://forums.unrealengine.com/t/crash-on-compile-unhandled-exception-exception-access-violation-reading-address-0x0000000000000138/477176)
**Author:** [@BEnSon1101](https://forums.unrealengine.com/u/BEnSon1101)\ **Replies:** 5\ **Last updated:** [July 3, 2023, 9:21am UTC](https://forums.unrealengine.com/t/crash-on-compile-unhandled-exception-exception-access-violation-reading-address-0x0000000000000138/477176 "2023-07-03T09:21:23Z")
i recently imported a few assets and blueprints from another project and i tried reparenting them, THIS DIDN’T WORK and i deleted all these blueprint classes but the crash still happens Unhandled Exception: EXCEPTION\_AC… --- ## [Losing progress for accidently hitting the stop button](https://forums.unrealengine.com/t/losing-progress-for-accidently-hitting-the-stop-button/1209837)
**Author:** [@Damien220](https://forums.unrealengine.com/u/Damien220)\ **Replies:** 5\ **Last updated:** [June 25, 2023, 10:10am UTC](https://forums.unrealengine.com/t/losing-progress-for-accidently-hitting-the-stop-button/1209837 "2023-06-25T10:10:09Z")
What ■■■■■■ me off, is thinking that hitting the play button when in editor, the game doesn’t save the progress, and then if i accidentally close the editor, all my work is lost, just because i forgot to hit the save but… --- ## [why ue5.1.1 prepares shaders again every time I change engine scalability?](https://forums.unrealengine.com/t/why-ue5-1-1-prepares-shaders-again-every-time-i-change-engine-scalability/1199007)
**Author:** [@Araz\_rajabi](https://forums.unrealengine.com/u/Araz_rajabi)\ **Replies:** 3\ **Last updated:** [June 14, 2023, 3:25pm UTC](https://forums.unrealengine.com/t/why-ue5-1-1-prepares-shaders-again-every-time-i-change-engine-scalability/1199007 "2023-06-14T15:25:44Z")
hello. I had ue5.0.3 and created a project with it. today I uninstalled it and installed ue5.1.1. in this new engine, almost every time I change “engine scalability” it starts preparing shaders again “almost 6000”. what… --- ## [Comments are causing my compile to fail !? help.](https://forums.unrealengine.com/t/comments-are-causing-my-compile-to-fail-help/741197)
**Author:** [@somawheels](https://forums.unrealengine.com/u/somawheels)\ **Replies:** 8\ **Last updated:** [January 4, 2023, 4:02pm UTC](https://forums.unrealengine.com/t/comments-are-causing-my-compile-to-fail-help/741197 "2023-01-04T16:02:03Z")
I suddenly started getting “unresolved external symbol” errors. I found the function causing this, but i dont understand why its causing the errors. This is the function void UModelData\_RSClass::encode\_or\_decode\_Forma… [Next page](https://forums.unrealengine.com/tag/compile/617.md?match_all_tags=true&page=1&tags%5B%5D=compile)