# \#unrealbuildtool **URL:** https://forums.unrealengine.com/tag/unrealbuildtool/761.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [Can't create or compile new projects in C++](https://forums.unrealengine.com/t/cant-create-or-compile-new-projects-in-c/2735784)
**Author:** [@LoganDolan](https://forums.unrealengine.com/u/LoganDolan)\ **Replies:** 3\ **Last updated:** [July 16, 2026, 4:20am UTC](https://forums.unrealengine.com/t/cant-create-or-compile-new-projects-in-c/2735784 "2026-07-16T04:20:43Z")
I am having issues creating projects and linking them to Visual Studio. Projects made aren’t recognized in the launcher and the project files don’t recognize Unreal Engine itself. I cannot build through VS, or live code … --- ## [UE5 source build packaging takes 2 hours vs 2 minutes (launcher) ](https://forums.unrealengine.com/t/ue5-source-build-packaging-takes-2-hours-vs-2-minutes-launcher/2719900)
**Author:** [@anchorHUN](https://forums.unrealengine.com/u/anchorHUN)\ **Replies:** 2\ **Last updated:** [July 5, 2026, 1:23pm UTC](https://forums.unrealengine.com/t/ue5-source-build-packaging-takes-2-hours-vs-2-minutes-launcher/2719900 "2026-07-05T13:23:04Z")
I’ve built UE 5.7 and 5.8 from source, and I’m seeing a huge difference in packaging times compared to the Epic launcher version. Using the launcher build, packaging the exact same project takes around 2 minutes. With … --- ## [Build Error UE 5.7](https://forums.unrealengine.com/t/build-error-ue-5-7/2720063)
**Author:** [@Alekre23](https://forums.unrealengine.com/u/Alekre23)\ **Replies:** 3\ **Last updated:** [May 5, 2026, 4:24pm UTC](https://forums.unrealengine.com/t/build-error-ue-5-7/2720063 "2026-05-05T16:24:22Z")
I haven’t been able to build an assembly for several days. Do you have any ideas? Logs: Log started at 05/05/2026 15:24:52 (2026-05-05T10:24:52Z) Resolved project argument D:\\UE\_Projects\\SCP\\SCP.uproject to D:\\UE\_Proje… --- ## [Can someone give me tutorial how to achieve this in Unreal Engine 5?](https://forums.unrealengine.com/t/can-someone-give-me-tutorial-how-to-achieve-this-in-unreal-engine-5/2710462)
**Author:** [@VADS1452](https://forums.unrealengine.com/u/VADS1452)\ **Replies:** 1\ **Last updated:** [March 31, 2026, 6:17pm UTC](https://forums.unrealengine.com/t/can-someone-give-me-tutorial-how-to-achieve-this-in-unreal-engine-5/2710462 "2026-03-31T18:17:52Z")
Hey :waving\_hand: I’m currently creating my game “Nightfall: Find Your Way” and I want to replicate this type of smooth combat attack (video attached click here watch at 0:30, credit: Project: Unknown). Can someone giv… --- ## [Drowning in massive Blueprint graphs? Meet the tool that turns CHAOS into a clean execution TREE.](https://forums.unrealengine.com/t/drowning-in-massive-blueprint-graphs-meet-the-tool-that-turns-chaos-into-a-clean-execution-tree/2675327)
**Author:** [@MchtMzffr](https://forums.unrealengine.com/u/MchtMzffr)\ **Replies:** 0\ **Last updated:** [November 15, 2025, 10:47am UTC](https://forums.unrealengine.com/t/drowning-in-massive-blueprint-graphs-meet-the-tool-that-turns-chaos-into-a-clean-execution-tree/2675327 "2025-11-15T10:47:59Z")
BlueprintOutline is now LIVE on Fab! Search on Fab: “Blueprint Outline” 30 different language options Output of stream Heat Line Map No more zooming… no more wire spaghetti… no more headaches. Just a clear, navigab… --- ## [cookprocesscount doesn't work well ](https://forums.unrealengine.com/t/cookprocesscount-doesnt-work-well/2656794)
**Author:** [@Alena\_Klevtsova](https://forums.unrealengine.com/u/Alena_Klevtsova)\ **Replies:** 0\ **Last updated:** [September 15, 2025, 2:57pm UTC](https://forums.unrealengine.com/t/cookprocesscount-doesnt-work-well/2656794 "2025-09-15T14:57:29Z")
Hi! I would like to know more about cookprocesscount. For example, now when I try to build my project with cookprocesscount=3, I have a lot of time for full cook, and if I want to use incremental cook, I get a time equal… --- ## [Unreal Build Accelerator fails to generate ispc headers on Linux.](https://forums.unrealengine.com/t/unreal-build-accelerator-fails-to-generate-ispc-headers-on-linux/2535786)
**Author:** [@AgentOfBurgundy](https://forums.unrealengine.com/u/AgentOfBurgundy)\ **Replies:** 9\ **Last updated:** [July 17, 2025, 12:31am UTC](https://forums.unrealengine.com/t/unreal-build-accelerator-fails-to-generate-ispc-headers-on-linux/2535786 "2025-07-17T00:31:06Z")
Summary Unreal Build Accelerator fails to generate ispc headers on Linux with the default setup. Either disabling ISPC or UBA makes the editor compile. The issues seems to have appeared somewhere between 5.4.4 and 5.5 P… --- ## [BuildConfiguration.xml about UBA ](https://forums.unrealengine.com/t/buildconfiguration-xml-about-uba/2480776)
**Author:** [@Wixye](https://forums.unrealengine.com/u/Wixye)\ **Replies:** 0\ **Last updated:** [April 29, 2025, 4:42am UTC](https://forums.unrealengine.com/t/buildconfiguration-xml-about-uba/2480776 "2025-04-29T04:42:51Z")
I use the UBA in our Project and Engine5.5.4. I want to modify agent’s MaxCoreNum in compile How should I configure the parameters in buildconfiguration.xml. Which parameters are relevant to UBA? Where should I go to… --- ## [A Formal Letter from Your Unreal Build System](https://forums.unrealengine.com/t/a-formal-letter-from-your-unreal-build-system/2363267)
**Author:** [@GodsGlitch](https://forums.unrealengine.com/u/GodsGlitch)\ **Replies:** 0\ **Last updated:** [February 27, 2025, 7:47pm UTC](https://forums.unrealengine.com/t/a-formal-letter-from-your-unreal-build-system/2363267 "2025-02-27T19:47:31Z")
Dear Developer, I am writing to inform you that I am currently processing your request to compile one (1) line of code. I have consulted with every header file since 1970, checked in with both C++ standards committees, … --- ## [Launching Unreal Editor from VS2022 fails. "UnrealBuildTool.exe (process 1412) exited with code 1 (0x1)"](https://forums.unrealengine.com/t/launching-unreal-editor-from-vs2022-fails-unrealbuildtool-exe-process-1412-exited-with-code-1-0x1/2253835)
**Author:** [@Ninjaclown123](https://forums.unrealengine.com/u/Ninjaclown123)\ **Replies:** 1\ **Last updated:** [January 1, 2025, 2:14pm UTC](https://forums.unrealengine.com/t/launching-unreal-editor-from-vs2022-fails-unrealbuildtool-exe-process-1412-exited-with-code-1-0x1/2253835 "2025-01-01T14:14:15Z")
My project was a blueprints-only project and I added C++ to it. I generated the VS files by right clicking on .uproject and clicking “Generate Visual Studio project files”. The first time I opened and built my .sln file,… --- ## [Hi2 guys. I have a issue about UnrealBuildTool.Json file. Cant packaging BP project. Any idea for fix it. ](https://forums.unrealengine.com/t/hi2-guys-i-have-a-issue-about-unrealbuildtool-json-file-cant-packaging-bp-project-any-idea-for-fix-it/1899082)
**Author:** [@Creed976](https://forums.unrealengine.com/u/Creed976)\ **Replies:** 2\ **Last updated:** [November 21, 2024, 5:38pm UTC](https://forums.unrealengine.com/t/hi2-guys-i-have-a-issue-about-unrealbuildtool-json-file-cant-packaging-bp-project-any-idea-for-fix-it/1899082 "2024-11-21T17:38:13Z")
UATHelper: Packaging (Windows): \*\*\*\*\*\*\*\*\*\* BUILD COMMAND STARTED \*\*\*\*\*\*\*\*\*\* UATHelper: Packaging (Windows): Running: C:\\Program Files\\Epic Games\\UE\_5.3\\Engine\\Binaries\\ThirdParty\\DotNet\\6.0.302\\windows\\dotnet.exe “C:\\Pr… --- ## [Installed Build is too large](https://forums.unrealengine.com/t/installed-build-is-too-large/776405)
**Author:** [@JasonMa233](https://forums.unrealengine.com/u/JasonMa233)\ **Replies:** 9\ **Last updated:** [November 16, 2024, 11:15pm UTC](https://forums.unrealengine.com/t/installed-build-is-too-large/776405 "2024-11-16T23:15:36Z")
I compiled the Installed Build Engine from source code of UE5.1 using the following command: Engine\\Build\\BatchFiles\\RunUAT.bat BuildGraph -target="Make Installed Build Win64" -script=Engine/Build/InstalledEngineBuild.x… --- ## [UnrealBuildTool Failed to Compile](https://forums.unrealengine.com/t/unrealbuildtool-failed-to-compile/286079)
**Author:** [@Kybe\_1](https://forums.unrealengine.com/u/Kybe_1)\ **Replies:** 6\ **Last updated:** [October 25, 2024, 3:36pm UTC](https://forums.unrealengine.com/t/unrealbuildtool-failed-to-compile/286079 "2024-10-25T15:36:09Z")
The UnrealBuildTool.exe is missing from “UESource\\Engine\\Binaries\\DotNET” --- ## [problem with TargetRules/UnrealBuildTool while packaging](https://forums.unrealengine.com/t/problem-with-targetrules-unrealbuildtool-while-packaging/2082312)
**Author:** [@rizqi82](https://forums.unrealengine.com/u/rizqi82)\ **Replies:** 0\ **Last updated:** [October 23, 2024, 8:57am UTC](https://forums.unrealengine.com/t/problem-with-targetrules-unrealbuildtool-while-packaging/2082312 "2024-10-23T08:57:47Z")
I want to build/package to windows/.exe but this error appear: UATHelper: Packaging (Windows): Expecting to find a type to be declared in a target rules named 'JagadCurrent0310Target'. This type must derive from the 'T… --- ## [Rebuild UnrealBuildTool in UE 5.4 on MacOS](https://forums.unrealengine.com/t/rebuild-unrealbuildtool-in-ue-5-4-on-macos/2003247)
**Author:** [@Zaratusa](https://forums.unrealengine.com/u/Zaratusa)\ **Replies:** 1\ **Last updated:** [September 14, 2024, 11:33am UTC](https://forums.unrealengine.com/t/rebuild-unrealbuildtool-in-ue-5-4-on-macos/2003247 "2024-09-14T11:33:11Z")
Hi, I’ve made some adjustments to the WriteEntitlements method in IOSExports.cs in the UnrealBuildTool in order to write associated domains to the entitlements. But the changes doesn’t seem to trigger a new build for th… --- ## [hi guys . im new ue5 ,I don't know how to put my command lines into ue5, so can anyone help me?im using c++ program language thanks everyone](https://forums.unrealengine.com/t/hi-guys-im-new-ue5-i-dont-know-how-to-put-my-command-lines-into-ue5-so-can-anyone-help-me-im-using-c-program-language-thanks-everyone/1871003)
**Author:** [@UiLatroi](https://forums.unrealengine.com/u/UiLatroi)\ **Replies:** 2\ **Last updated:** [May 27, 2024, 12:07am UTC](https://forums.unrealengine.com/t/hi-guys-im-new-ue5-i-dont-know-how-to-put-my-command-lines-into-ue5-so-can-anyone-help-me-im-using-c-program-language-thanks-everyone/1871003 "2024-05-27T00:07:25Z")
hi guys . im new ue5 ,I don’t know how to put my command lines into ue5, so can anyone help me?im using c++ program language thanks everyone --- ## [Unreal Build Tool Not Packaging: Unable to instantiate UnrealEd module for non-editor targets: Target -\> \*.Build.cs -\> UMGEditor.Build.cs -\> Sequencer.Build.cs](https://forums.unrealengine.com/t/unreal-build-tool-not-packaging-unable-to-instantiate-unrealed-module-for-non-editor-targets-target-build-cs-umgeditor-build-cs-sequencer-build-cs/495049)
**Author:** [@Vlajd](https://forums.unrealengine.com/u/Vlajd)\ **Replies:** 8\ **Last updated:** [May 5, 2024, 3:15am UTC](https://forums.unrealengine.com/t/unreal-build-tool-not-packaging-unable-to-instantiate-unrealed-module-for-non-editor-targets-target-build-cs-umgeditor-build-cs-sequencer-build-cs/495049 "2024-05-05T03:15:10Z")
Unreal is having trouble packaging my game: I can't figure this one out on my own, maybe someone here can help me out... (Using UE5 on a regular Windows machine, C++ project with mostly Blueprint-C++ usage) I have t… --- ## [Build error Visual Studio](https://forums.unrealengine.com/t/build-error-visual-studio/1672213)
**Author:** [@Gramachandran](https://forums.unrealengine.com/u/Gramachandran)\ **Replies:** 2\ **Last updated:** [February 15, 2024, 6:01pm UTC](https://forums.unrealengine.com/t/build-error-visual-studio/1672213 "2024-02-15T18:01:37Z")
I am getting build issue with Unreal Engine 5.3 and Visual Studio 2022 I regenerated the project file and errors occurs when I try to build from solution file. I cant open the project unless its build from source. Can … --- ## [Launch session in UEFN](https://forums.unrealengine.com/t/launch-session-in-uefn/1499781)
**Author:** [@Myallo](https://forums.unrealengine.com/u/Myallo)\ **Replies:** 3\ **Last updated:** [February 15, 2024, 10:45am UTC](https://forums.unrealengine.com/t/launch-session-in-uefn/1499781 "2024-02-15T10:45:35Z")
I have downloaded the game on my laptop, then copied it into my PC on a hard desk. I have now UEFN on both, but on the PC I can’t launch the sessions! why’s that? always “Session Disconnected” --- ## [UE5 Shader Crash by using FASTBuild](https://forums.unrealengine.com/t/ue5-shader-crash-by-using-fastbuild/1654048)
**Author:** [@jinyoung\_04](https://forums.unrealengine.com/u/jinyoung_04)\ **Replies:** 0\ **Last updated:** [January 30, 2024, 4:02pm UTC](https://forums.unrealengine.com/t/ue5-shader-crash-by-using-fastbuild/1654048 "2024-01-30T16:02:14Z")
I’m trying to build unreal engine 5 using FASTBuild. There are 5 workers using 10 cpu each. But, it took longer than when I did not use FASTBuild. Anybody knows the reason? In addition, when I run editor it occurs shade… --- ## [How do I fix a "Missing precompiled manifest for 'TextureFormat'" packaging error?](https://forums.unrealengine.com/t/how-do-i-fix-a-missing-precompiled-manifest-for-textureformat-packaging-error/1603354)
**Author:** [@Sweenus987](https://forums.unrealengine.com/u/Sweenus987)\ **Replies:** 1\ **Last updated:** [January 10, 2024, 4:17pm UTC](https://forums.unrealengine.com/t/how-do-i-fix-a-missing-precompiled-manifest-for-textureformat-packaging-error/1603354 "2024-01-10T16:17:12Z")
Everything builds and cooks fine but when I try and package the project for Windows, I get the following error: Missing precompiled manifest for 'TextureFormat', 'C:\\Program Files\\Epic Games\\UE\_5.3\\Engine\\Intermediate\\B… --- ## [Why is there errors?](https://forums.unrealengine.com/t/why-is-there-errors/1331654)
**Author:** [@Lover\_Furry](https://forums.unrealengine.com/u/Lover_Furry)\ **Replies:** 1\ **Last updated:** [October 13, 2023, 7:12pm UTC](https://forums.unrealengine.com/t/why-is-there-errors/1331654 "2023-10-13T19:12:44Z")
Why is there errors? i tried to understand but i dont. I searched in internet, but there’s no such things. I just wanna script in vs code but not in vs community, cuz first is lighter than second --- ## [Packaging Plugin Calls Wrong Version of Visual Studio](https://forums.unrealengine.com/t/packaging-plugin-calls-wrong-version-of-visual-studio/483625)
**Author:** [@CoolNamesGone](https://forums.unrealengine.com/u/CoolNamesGone)\ **Replies:** 2\ **Last updated:** [April 22, 2023, 8:11pm UTC](https://forums.unrealengine.com/t/packaging-plugin-calls-wrong-version-of-visual-studio/483625 "2023-04-22T20:11:21Z")
I’ve got a working blueprint function library plugin written in C++. I’ve got Visual Studio 2019 installed, although the development environment is in C:\\Applications rather than C:\\Programs (x86). When I try to package … --- ## [UE5.1.1project ios package failed on mac](https://forums.unrealengine.com/t/ue5-1-1project-ios-package-failed-on-mac/807317)
**Author:** [@Anonymous\_b928604725980997aea1b508b8ea0b26](https://forums.unrealengine.com/u/Anonymous_b928604725980997aea1b508b8ea0b26)\ **Replies:** 0\ **Last updated:** [March 23, 2023, 9:05am UTC](https://forums.unrealengine.com/t/ue5-1-1project-ios-package-failed-on-mac/807317 "2023-03-23T09:05:56Z")
I’m packaged my project for iOS from my Mac,but failed. However, the same project can be packaged successfully with 4.27. and this is error message --- ## [Setting Global Preprocessor definitions for a module](https://forums.unrealengine.com/t/setting-global-preprocessor-definitions-for-a-module/339593)
**Author:** [@datadrgn](https://forums.unrealengine.com/u/datadrgn)\ **Replies:** 6\ **Last updated:** [March 2, 2023, 1:26pm UTC](https://forums.unrealengine.com/t/setting-global-preprocessor-definitions-for-a-module/339593 "2023-03-02T13:26:59Z")
I want to add a processor definition that can be defined at a project level that would set it globally for the engine too. This is mainly for engine changes that should only be taken into account for a certain project (… --- ## [ios build from windows pc eror Remote compiling requires a server name. Use the editor](https://forums.unrealengine.com/t/ios-build-from-windows-pc-eror-remote-compiling-requires-a-server-name-use-the-editor/737122)
**Author:** [@anonymous\_user\_ef00af7a](https://forums.unrealengine.com/u/anonymous_user_ef00af7a)\ **Replies:** 0\ **Last updated:** [December 27, 2022, 6:12pm UTC](https://forums.unrealengine.com/t/ios-build-from-windows-pc-eror-remote-compiling-requires-a-server-name-use-the-editor/737122 "2022-12-27T18:12:15Z")
Hello everyone when i build my ios mobile game project from my windows pc i take this error how i solve this thank you --- ## [How to set Target.WindowsPlatform.bUpdatedCPPMacro?](https://forums.unrealengine.com/t/how-to-set-target-windowsplatform-bupdatedcppmacro/736218)
**Author:** [@ImJustAZizolo](https://forums.unrealengine.com/u/ImJustAZizolo)\ **Replies:** 0\ **Last updated:** [December 26, 2022, 10:58am UTC](https://forums.unrealengine.com/t/how-to-set-target-windowsplatform-bupdatedcppmacro/736218 "2022-12-26T10:58:49Z")
Hello, I’m trying to use a third party library inside ue5. For it to compile, I need to add the “Zc\_\_cplusplus” option to the compiler. While going through a file named “VCToolChain.cs” I found out that, the needed opt… --- ## [Gameplay Attribute does not change](https://forums.unrealengine.com/t/gameplay-attribute-does-not-change/475739)
**Author:** [@CureDespair](https://forums.unrealengine.com/u/CureDespair)\ **Replies:** 3\ **Last updated:** [December 4, 2022, 3:50pm UTC](https://forums.unrealengine.com/t/gameplay-attribute-does-not-change/475739 "2022-12-04T15:50:16Z")
I am using the Gameplay Ability System. I have a game play effect which changes an attribute but it will not change the attribute I want. I can make a modifier of the effect to change a particular attribute just fine. Ho… --- ## [Where "BuildConfiguration.xml" should be located?](https://forums.unrealengine.com/t/where-buildconfiguration-xml-should-be-located/305154)
**Author:** [@Muzaheed](https://forums.unrealengine.com/u/Muzaheed)\ **Replies:** 10\ **Last updated:** [October 10, 2021, 7:27pm UTC](https://forums.unrealengine.com/t/where-buildconfiguration-xml-should-be-located/305154 "2021-10-10T19:27:09Z")
where “BuildConfiguration.xml” should be located? i read this from “UE4/Engine/Programs/UnrealBuildTool/BuildConfiguration.xml”: There are four possible location for this file: a. UE4/Engine/Programs/UnrealBuildTo… --- ## [UnrealBuildTool : error : System.ComponentModel.Win32Exception (0x80004005) While build in Visual Studio](https://forums.unrealengine.com/t/unrealbuildtool-error-system-componentmodel-win32exception-0x80004005-while-build-in-visual-studio/459344)
**Author:** [@UnrealVerseGuru](https://forums.unrealengine.com/u/UnrealVerseGuru)\ **Replies:** 3\ **Last updated:** [September 9, 2021, 4:23pm UTC](https://forums.unrealengine.com/t/unrealbuildtool-error-system-componentmodel-win32exception-0x80004005-while-build-in-visual-studio/459344 "2021-09-09T16:23:20Z")
Hello, while hitting build I get this and nothing helps: UnrealBuildTool : error : System.ComponentModel.Win32Exception (0x80004005): Nie można odnaleźć określonego pliku 1\> w System.Diagnostic… [Next page](https://forums.unrealengine.com/tag/unrealbuildtool/761.md?match_all_tags=true&page=1&tags%5B%5D=unrealbuildtool)