# \#compile-editor **URL:** https://forums.unrealengine.com/tag/compile-editor/10654.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [how to check compiling shaders finished by blueprint or c++](https://forums.unrealengine.com/t/how-to-check-compiling-shaders-finished-by-blueprint-or-c/474604)
**Author:** [@shinozaki\_ss](https://forums.unrealengine.com/u/shinozaki_ss)\ **Replies:** 13\ **Last updated:** [March 20, 2025, 7:53am UTC](https://forums.unrealengine.com/t/how-to-check-compiling-shaders-finished-by-blueprint-or-c/474604 "2025-03-20T07:53:31Z")
ues Editor Utility Widget When importing the model, the compiler always compiles the shaders automatically. Can I get a certain return value after the completion of the compilation of the shaders, which is convenient fo… --- ## [Function doesnt work until i compile, when i start Editor](https://forums.unrealengine.com/t/function-doesnt-work-until-i-compile-when-i-start-editor/468263)
**Author:** [@SakiGGs](https://forums.unrealengine.com/u/SakiGGs)\ **Replies:** 13\ **Last updated:** [December 29, 2024, 12:52pm UTC](https://forums.unrealengine.com/t/function-doesnt-work-until-i-compile-when-i-start-editor/468263 "2024-12-29T12:52:25Z")
I have made function that adds items i pick up to my inventory. When i start Editor it doesnt work, i have to compile Blueprint that holds that function. So it goes like this. I start Editor, pick up doesnt work. I co… --- ## [Live Coding cannot be enabled after hot-reload has been used](https://forums.unrealengine.com/t/live-coding-cannot-be-enabled-after-hot-reload-has-been-used/446599)
**Author:** [@hubacek.jakub](https://forums.unrealengine.com/u/hubacek.jakub)\ **Replies:** 16\ **Last updated:** [January 29, 2024, 4:38am UTC](https://forums.unrealengine.com/t/live-coding-cannot-be-enabled-after-hot-reload-has-been-used/446599 "2024-01-29T04:38:19Z")
Hi, after project upgrade from 4.20 to 4.22 I was looking forward to try live coding feature, but so far I was unable to make it work. When I launch editor ( without debugger ) and enable experimental live coding featu… --- ## [Editor launch error post crash: libUE4Editor-UnrealEd.so: undefined symbol: \_ZN11FDDCCleanup8RunnableE](https://forums.unrealengine.com/t/editor-launch-error-post-crash-libue4editor-unrealed-so-undefined-symbol-zn11fddccleanup8runnablee/490415)
**Author:** [@anonymous\_user\_7355c217](https://forums.unrealengine.com/u/anonymous_user_7355c217)\ **Replies:** 1\ **Last updated:** [September 19, 2023, 3:56am UTC](https://forums.unrealengine.com/t/editor-launch-error-post-crash-libue4editor-unrealed-so-undefined-symbol-zn11fddccleanup8runnablee/490415 "2023-09-19T03:56:51Z")
After compiling from source and troubleshooting an issue regarding the CLionSourceCodeAccessor developer plugin and my /opt/ directory; I finally (and successfully) navigated the sub-menu to create a C++ class. The progr… --- ## [Unreal Build Tool Error: ubt\> ERROR: Unhandled exception: System.ArgumentNullException: Value cannot be null](https://forums.unrealengine.com/t/unreal-build-tool-error-ubt-error-unhandled-exception-system-argumentnullexception-value-cannot-be-null/469851)
**Author:** [@DevinSherry](https://forums.unrealengine.com/u/DevinSherry)\ **Replies:** 3\ **Last updated:** [June 29, 2023, 11:38am UTC](https://forums.unrealengine.com/t/unreal-build-tool-error-ubt-error-unhandled-exception-system-argumentnullexception-value-cannot-be-null/469851 "2023-06-29T11:38:43Z")
When I attempt to compile via the Unreal Game Sync, I receive the following error: Compiling HeroEditor... ubt\> Running D:\\Hero4.25\\Engine\\Binaries\\DotNET\\UnrealBuildTool.exe HeroEditor Win64 Debug "D:\\Hero4.25\\Hero\\Her… --- ## [Error MSB3073](https://forums.unrealengine.com/t/error-msb3073/1159796)
**Author:** [@cadenspringer](https://forums.unrealengine.com/u/cadenspringer)\ **Replies:** 0\ **Last updated:** [May 9, 2023, 6:34am UTC](https://forums.unrealengine.com/t/error-msb3073/1159796 "2023-05-09T06:34:49Z")
Hello, first thank you for reading this post. I have a question about the MSB3073. I try to upgrade the project from 5.0.3 to 5.1.1. Here is my environment: Unreal 5.1.1 Visual Studio Community 2022 Here is the erro… --- ## [Dual Xeon - 40 Cores. Painfully Slow Shader Compiling.](https://forums.unrealengine.com/t/dual-xeon-40-cores-painfully-slow-shader-compiling/439113)
**Author:** [@unrealengine123](https://forums.unrealengine.com/u/unrealengine123)\ **Replies:** 6\ **Last updated:** [March 29, 2023, 4:07am UTC](https://forums.unrealengine.com/t/dual-xeon-40-cores-painfully-slow-shader-compiling/439113 "2023-03-29T04:07:59Z")
Im having extremely slow shader compilings on these latest versions of UE4. A compile of 5000 takes me about 15 minutes. Moreover when i edit any parameter in the material editor, the compiler starts compiling. and any o… --- ## [Why should i use visual studio for writing c++ code? cant i compile from any other c++ compiler's and include it in unreal? why is this close coupling between unreal and visual studio?](https://forums.unrealengine.com/t/why-should-i-use-visual-studio-for-writing-c-code-cant-i-compile-from-any-other-c-compilers-and-include-it-in-unreal-why-is-this-close-coupling-between-unreal-and-visual-studio/451112)
**Author:** [@MalleshKarre](https://forums.unrealengine.com/u/MalleshKarre)\ **Replies:** 4\ **Last updated:** [March 24, 2022, 4:00pm UTC](https://forums.unrealengine.com/t/why-should-i-use-visual-studio-for-writing-c-code-cant-i-compile-from-any-other-c-compilers-and-include-it-in-unreal-why-is-this-close-coupling-between-unreal-and-visual-studio/451112 "2022-03-24T16:00:45Z")
is there any other way to compile and include c++ files, other than using visual studio. --- ## [Linux: No compiler was found](https://forums.unrealengine.com/t/linux-no-compiler-was-found/461921)
**Author:** [@anonymous\_user\_bd1d29981](https://forums.unrealengine.com/u/anonymous_user_bd1d29981)\ **Replies:** 2\ **Last updated:** [October 30, 2021, 2:01am UTC](https://forums.unrealengine.com/t/linux-no-compiler-was-found/461921 "2021-10-30T02:01:16Z")
Compiled UE Editor using 4.24 Release branch, compiles and builds fine, and also downloads a copy of llvm and adds it to the editor engine folder. However when I generate my project based on the ThirdPerson template an… --- ## [Unable To Compile UEBuildConfiguration does not exist](https://forums.unrealengine.com/t/unable-to-compile-uebuildconfiguration-does-not-exist/489556)
**Author:** [@ChrisMcCole](https://forums.unrealengine.com/u/ChrisMcCole)\ **Replies:** 0\ **Last updated:** [October 5, 2021, 2:34pm UTC](https://forums.unrealengine.com/t/unable-to-compile-uebuildconfiguration-does-not-exist/489556 "2021-10-05T14:34:13Z")
Hello! I am compiling UE4 from source and I am struggling to integrate the Steamworks SDK. I have followed the guide on their site, I have watched videos, and I am now following another guide in which it is saying to dyn… --- ## [Compilation button causes editor to crash but compilation works in Visual Studio. Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0x00000019](https://forums.unrealengine.com/t/compilation-button-causes-editor-to-crash-but-compilation-works-in-visual-studio-unhandled-exception-exception-access-violation-reading-address-0x00000019/469387)
**Author:** [@TypeFinalMagic](https://forums.unrealengine.com/u/TypeFinalMagic)\ **Replies:** 8\ **Last updated:** [July 9, 2021, 5:31pm UTC](https://forums.unrealengine.com/t/compilation-button-causes-editor-to-crash-but-compilation-works-in-visual-studio-unhandled-exception-exception-access-violation-reading-address-0x00000019/469387 "2021-07-09T17:31:22Z")
I am having an issue that is bugging me. I recently switched a project from 4.23 to 4.25 and that had worked fine and then later switched from Visual Studio 2017 to Visual Studio 2019 and now I am running into an issue w… --- ## [Won't compile any scenes](https://forums.unrealengine.com/t/wont-compile-any-scenes/484900)
**Author:** [@BrentGrigsby](https://forums.unrealengine.com/u/BrentGrigsby)\ **Replies:** 0\ **Last updated:** [June 14, 2021, 10:45pm UTC](https://forums.unrealengine.com/t/wont-compile-any-scenes/484900 "2021-06-14T22:45:40Z")
“UnrealLightMass-Project.dll and embree.dll are either corrupted or not able to run in Windows.” Something to that effect. I am using Windows 10 64-bit with 32GB of ram and an NVIDIA NVS300. The games run fine in the edi… --- ## [Very long c++ compiling](https://forums.unrealengine.com/t/very-long-c-compiling/484394)
**Author:** [@anonymous\_user\_0202af0f1](https://forums.unrealengine.com/u/anonymous_user_0202af0f1)\ **Replies:** 4\ **Last updated:** [June 4, 2021, 12:56pm UTC](https://forums.unrealengine.com/t/very-long-c-compiling/484394 "2021-06-04T12:56:47Z")
When I try to compile my c++ code in UE5’s early access it takes over 10 minutes, most on the time it’s stuck on “Building x actions with y processes”, but if I compile the same code in UE 4.25 it only takes a few second… --- ## [How to start UE4 instance when building from source after I've closed the Visual Studio project without having to build it from scratch every time?](https://forums.unrealengine.com/t/how-to-start-ue4-instance-when-building-from-source-after-ive-closed-the-visual-studio-project-without-having-to-build-it-from-scratch-every-time/483219)
**Author:** [@komputer](https://forums.unrealengine.com/u/komputer)\ **Replies:** 10\ **Last updated:** [May 12, 2021, 7:23pm UTC](https://forums.unrealengine.com/t/how-to-start-ue4-instance-when-building-from-source-after-ive-closed-the-visual-studio-project-without-having-to-build-it-from-scratch-every-time/483219 "2021-05-12T19:23:37Z")
Hello, my first question here, so I hope I file it correctly. In order to use ARCore I’m required to build UE4 from source. This took a really long time but I finally managed to do run it. It was working fine when I star… --- ## [Hotreloading and similar unseen Traps](https://forums.unrealengine.com/t/hotreloading-and-similar-unseen-traps/482717)
**Author:** [@22u\_79](https://forums.unrealengine.com/u/22u_79)\ **Replies:** 0\ **Last updated:** [April 30, 2021, 5:07pm UTC](https://forums.unrealengine.com/t/hotreloading-and-similar-unseen-traps/482717 "2021-04-30T17:07:56Z")
Hi, I have been using ue4 for a year now, but because of a mix of real-world distractions, second guesses on how good a game-idea is, and numerous bugs that ruined projects I haven’t come very far with my ideas yet. I a… --- ## [Getting Error while running in editor](https://forums.unrealengine.com/t/getting-error-while-running-in-editor/481999)
**Author:** [@jaysjibes](https://forums.unrealengine.com/u/jaysjibes)\ **Replies:** 0\ **Last updated:** [April 15, 2021, 11:55pm UTC](https://forums.unrealengine.com/t/getting-error-while-running-in-editor/481999 "2021-04-15T23:55:29Z")
I get this error message every time I hit play in the editor. “One or more blueprints have been modified without being recompiled. Do you want to compile them now?” It does this in every scene and every project. I also… --- ## [Can't Compile Editor macOS](https://forums.unrealengine.com/t/cant-compile-editor-macos/481771)
**Author:** [@anonymous\_user\_022525b61](https://forums.unrealengine.com/u/anonymous_user_022525b61)\ **Replies:** 0\ **Last updated:** [April 12, 2021, 8:54am UTC](https://forums.unrealengine.com/t/cant-compile-editor-macos/481771 "2021-04-12T08:54:51Z")
Hey guys! I recently joined a project and downloaded the code from source control, when I tried opening the project it game me the message “Missing Branching Sickness\[Project Name\] Modules” and gives me the option to reb… --- ## [Why compiling is so slow?](https://forums.unrealengine.com/t/why-compiling-is-so-slow/480603)
**Author:** [@BestWarrior](https://forums.unrealengine.com/u/BestWarrior)\ **Replies:** 0\ **Last updated:** [March 20, 2021, 12:46pm UTC](https://forums.unrealengine.com/t/why-compiling-is-so-slow/480603 "2021-03-20T12:46:33Z")
My laptop has a i7-4720HQ CPU with 12 GB ram. The UE editor ranges from 80 to 800 MB ram and visual code 200 MB ram. When I try to compile I wait one hour and it’s still not ready. I have a few classes, I included CoreMi… --- ## [Is the constructor only called when the Editor is started?](https://forums.unrealengine.com/t/is-the-constructor-only-called-when-the-editor-is-started/479547)
**Author:** [@koutaaiba](https://forums.unrealengine.com/u/koutaaiba)\ **Replies:** 3\ **Last updated:** [March 4, 2021, 11:14pm UTC](https://forums.unrealengine.com/t/is-the-constructor-only-called-when-the-editor-is-started/479547 "2021-03-04T23:14:05Z")
Is the constructor only called when the Editor is started? Is there a way to call it at compile time? --- ## [Compile Unreal Lightmass](https://forums.unrealengine.com/t/compile-unreal-lightmass/476737)
**Author:** [@Applebk](https://forums.unrealengine.com/u/Applebk)\ **Replies:** 0\ **Last updated:** [January 3, 2021, 4:49pm UTC](https://forums.unrealengine.com/t/compile-unreal-lightmass/476737 "2021-01-03T16:49:40Z")
Hi, I keep trying to build my lighting but it fails because it can’t kick off Swarm. It tells me to compile my UnrealLightmass. I know that’s in Visual Studio, but I can’t find Lightmass. If I search it comes back with n… --- ## [What source code related files can be removed after compilation? I just want to keep the builded editor and the necessary dependencies](https://forums.unrealengine.com/t/what-source-code-related-files-can-be-removed-after-compilation-i-just-want-to-keep-the-builded-editor-and-the-necessary-dependencies/464201)
**Author:** [@emklean](https://forums.unrealengine.com/u/emklean)\ **Replies:** 1\ **Last updated:** [November 24, 2020, 10:57pm UTC](https://forums.unrealengine.com/t/what-source-code-related-files-can-be-removed-after-compilation-i-just-want-to-keep-the-builded-editor-and-the-necessary-dependencies/464201 "2020-11-24T22:57:27Z")
I just compiled the Editor from source code. At first look it works fine. The only thing is that the entire root folder ( /UnrealEngine ) size is 63,2 GB after compilation. Can I delete some source code related files for… --- ## [Problem compiling game with Installed Build binary engine](https://forums.unrealengine.com/t/problem-compiling-game-with-installed-build-binary-engine/462289)
**Author:** [@superdreamgen](https://forums.unrealengine.com/u/superdreamgen)\ **Replies:** 1\ **Last updated:** [November 19, 2020, 3:42pm UTC](https://forums.unrealengine.com/t/problem-compiling-game-with-installed-build-binary-engine/462289 "2020-11-19T15:42:14Z")
I made some tiny changes to the Unreal Engine source, and then I created an Installed Build of the engine using the instructions here: https://docs.unrealengine.com/en-US/...ild/index.html The Installed Build compiles … --- ## [Why is the mouse cursor treated that wrong?](https://forums.unrealengine.com/t/why-is-the-mouse-cursor-treated-that-wrong/473005)
**Author:** [@anonymous\_user\_73febc17](https://forums.unrealengine.com/u/anonymous_user_73febc17)\ **Replies:** 0\ **Last updated:** [October 16, 2020, 5:00am UTC](https://forums.unrealengine.com/t/why-is-the-mouse-cursor-treated-that-wrong/473005 "2020-10-16T05:00:48Z")
Hi there, I just compiled the editor on archlinux because I can not find a pre compiled version for linux. I did not get any errors on compilation. When I click somewhere in the editor a point way more to the upper left… --- ## [Compile button is greyed out](https://forums.unrealengine.com/t/compile-button-is-greyed-out/472595)
**Author:** [@anonymous\_user\_762b9c08](https://forums.unrealengine.com/u/anonymous_user_762b9c08)\ **Replies:** 0\ **Last updated:** [October 8, 2020, 12:36pm UTC](https://forums.unrealengine.com/t/compile-button-is-greyed-out/472595 "2020-10-08T12:36:43Z")
Why is the compile button greyed out for C++ in Unreal Engine 4. I’m using Visual Studio and the compile button is greyed out. Is there some check box I have to tick or something? --- ## [Compile button is greyed out](https://forums.unrealengine.com/t/compile-button-is-greyed-out/472591)
**Author:** [@anonymous\_user\_762b9c08](https://forums.unrealengine.com/u/anonymous_user_762b9c08)\ **Replies:** 0\ **Last updated:** [October 8, 2020, 11:20am UTC](https://forums.unrealengine.com/t/compile-button-is-greyed-out/472591 "2020-10-08T11:20:06Z")
Why is the compile button greyed out for C++ in Unreal Engine 4. I’m using Visual Studio and the compile button is greyed out. Is there some check box I have to tick or something? --- ## [Can't package for 32 bit with 4.25 possible bug](https://forums.unrealengine.com/t/cant-package-for-32-bit-with-4-25-possible-bug/469268)
**Author:** [@ATHIEK](https://forums.unrealengine.com/u/ATHIEK)\ **Replies:** 1\ **Last updated:** [September 25, 2020, 3:31pm UTC](https://forums.unrealengine.com/t/cant-package-for-32-bit-with-4-25-possible-bug/469268 "2020-09-25T15:31:06Z")
package without problem for 64 bit, here is the log: UATHelper: Packaging (Windows (32-bit)): Using Visual Studio 2017 14.16.27032 toolchain (C:\\Program Files (x86)\\Microsoft Visual Studio\\2017\\Community\\VC\\Tools\\MSVC… --- ## [How do you iterate on an Editor Module?](https://forums.unrealengine.com/t/how-do-you-iterate-on-an-editor-module/430776)
**Author:** [@anonymous\_user\_700a794c](https://forums.unrealengine.com/u/anonymous_user_700a794c)\ **Replies:** 5\ **Last updated:** [July 24, 2020, 9:13am UTC](https://forums.unrealengine.com/t/how-do-you-iterate-on-an-editor-module/430776 "2020-07-24T09:13:41Z")
TL;DR How do I structure an Editor module to allow a developer to see changes (i.e. Slate code) without restarting UE4 after every compile? Edit: Also, if this just isn’t possible, then that is equally good to know, so… --- ## [Error launching UE4 Debian](https://forums.unrealengine.com/t/error-launching-ue4-debian/464569)
**Author:** [@anonymous\_user\_1d73bd4a](https://forums.unrealengine.com/u/anonymous_user_1d73bd4a)\ **Replies:** 1\ **Last updated:** [June 13, 2020, 11:36pm UTC](https://forums.unrealengine.com/t/error-launching-ue4-debian/464569 "2020-06-13T23:36:57Z")
OS: Debian Buster Xfce4 CPU: Intel i3 550 3200 Mhz RAM: 4 GB GPU: nvidia GeForce 210 Hi, compiled UE4 on Linux after download the source.zip. After compiling I started engine/binaries/linux/UE4Game from terminal, it … --- ## [Shaders now compiling on standalone play????](https://forums.unrealengine.com/t/shaders-now-compiling-on-standalone-play/465890)
**Author:** [@GreenHowitzer](https://forums.unrealengine.com/u/GreenHowitzer)\ **Replies:** 1\ **Last updated:** [May 27, 2020, 5:57pm UTC](https://forums.unrealengine.com/t/shaders-now-compiling-on-standalone-play/465890 "2020-05-27T17:57:11Z")
Hello, all of a sudden after messing with RVT and SCGI the engine when I go to test a map or my game in standalone play mode in editor starts to compile shaders again??? If I play in editor window mode it doesn’t try t… --- ## [Editor Utility Widgets don't seem to properly update instances. Is this a bug?](https://forums.unrealengine.com/t/editor-utility-widgets-dont-seem-to-properly-update-instances-is-this-a-bug/465525)
**Author:** [@PDubulous](https://forums.unrealengine.com/u/PDubulous)\ **Replies:** 0\ **Last updated:** [May 20, 2020, 4:15pm UTC](https://forums.unrealengine.com/t/editor-utility-widgets-dont-seem-to-properly-update-instances-is-this-a-bug/465525 "2020-05-20T16:15:34Z")
Im using an editor utility widget to customize NPCs in my game and it has a child EWIDG that allows me to change the color on the NPCs. While trying to get function and event calls to work from the child to the parent, … [Next page](https://forums.unrealengine.com/tag/compile-editor/10654.md?match_all_tags=true&page=1&tags%5B%5D=compile-editor)