# \#compilation-error **URL:** https://forums.unrealengine.com/tag/compilation-error/5345.md [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) --- ## [ERROR: Clang must be installed in order to build this target](https://forums.unrealengine.com/t/error-clang-must-be-installed-in-order-to-build-this-target/483325)
**Author:** [@j\_mudo](https://forums.unrealengine.com/u/j_mudo)\ **Replies:** 4\ **Last updated:** [February 28, 2026, 10:01pm UTC](https://forums.unrealengine.com/t/error-clang-must-be-installed-in-order-to-build-this-target/483325 "2026-02-28T22:01:27Z")
I’ve been trying to generate a clang database to use with my editor on linux for what amounts to 3 days now and UBT doesn’t seem to want to do that. I’ve tried tweaking the ClangPath at Engine/Source/Programs/UnrealBuild… --- ## [Building UE 4.27 with VS 2026](https://forums.unrealengine.com/t/building-ue-4-27-with-vs-2026/2700816)
**Author:** [@RVillani](https://forums.unrealengine.com/u/RVillani)\ **Replies:** 2\ **Last updated:** [February 19, 2026, 5:23am UTC](https://forums.unrealengine.com/t/building-ue-4-27-with-vs-2026/2700816 "2026-02-19T05:23:51Z")
If, like me, you refuse to install an older VS when you have to work on older projects, you might get a bunch of errors from the AutomationTool if you happen to have an MSBuild.exe under this path: C:\\Windows\\Microsoft.… --- ## [UE 5.6 project creation fails on Default.rc2 / rc.exe — exit code -1](https://forums.unrealengine.com/t/ue-5-6-project-creation-fails-on-default-rc2-rc-exe-exit-code-1/2595642)
**Author:** [@Agraellah](https://forums.unrealengine.com/u/Agraellah)\ **Replies:** 4\ **Last updated:** [December 29, 2025, 3:56pm UTC](https://forums.unrealengine.com/t/ue-5-6-project-creation-fails-on-default-rc2-rc-exe-exit-code-1/2595642 "2025-12-29T15:56:58Z")
Hey folks, I’m running into a blocking issue when creating a new C++ project in Unreal Engine 5.6. The project fails to compile during creation (at about 2% progress) with the following error: \[1/48\] Resource Default.… --- ## [\[UE5.6 Upgrade\] 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’: … --- ## [Compilation failed - UE4.23 preview with Chaos](https://forums.unrealengine.com/t/compilation-failed-ue4-23-preview-with-chaos/454483)
**Author:** [@theRPGmaster](https://forums.unrealengine.com/u/theRPGmaster)\ **Replies:** 10\ **Last updated:** [August 2, 2024, 4:58pm UTC](https://forums.unrealengine.com/t/compilation-failed-ue4-23-preview-with-chaos/454483 "2024-08-02T16:58:09Z")
Compilation error: ‘metahost.h’ not found. I’ve been trying to compile the preview version for 4.23 from source (with Chaos enabled), and this error has been persistently occurring, looks like this is a quite common iss… --- ## [Error (C2248) while compiling blank project with Unreal 5.3.2](https://forums.unrealengine.com/t/error-c2248-while-compiling-blank-project-with-unreal-5-3-2/1523738)
**Author:** [@PeriLeTroll](https://forums.unrealengine.com/u/PeriLeTroll)\ **Replies:** 5\ **Last updated:** [March 10, 2024, 9:03pm UTC](https://forums.unrealengine.com/t/error-c2248-while-compiling-blank-project-with-unreal-5-3-2/1523738 "2024-03-10T21:03:15Z")
Hey, I’ve started using Unreal Engine on the 5.3.2 version, and when creating a blank C++ game, i’m getting the following : \[1/6\] Compile \[x64\] SharedPCH.Engine.Cpp20.cpp C:\\Program Files\\Epic Games\\UE\_5.3\\Engine\\Sourc… --- ## [Unreal Engine 5 Ubuntu 22.04.1 Rider 2022.3.2 compilation issues](https://forums.unrealengine.com/t/unreal-engine-5-ubuntu-22-04-1-rider-2022-3-2-compilation-issues/772342)
**Author:** [@Arius](https://forums.unrealengine.com/u/Arius)\ **Replies:** 0\ **Last updated:** [February 16, 2023, 6:18pm UTC](https://forums.unrealengine.com/t/unreal-engine-5-ubuntu-22-04-1-rider-2022-3-2-compilation-issues/772342 "2023-02-16T18:18:52Z")
Hey everyone, while compiling unreal engine from sources under the Rider IDE I face with some compilation errors with a couple of modules, also have some troubles with static analysis errors at Build.cs files. I’m using… --- ## [Binding to UPathFollowingComponent OnRequestFinished Event](https://forums.unrealengine.com/t/binding-to-upathfollowingcomponent-onrequestfinished-event/447698)
**Author:** [@Good\_Laugh](https://forums.unrealengine.com/u/Good_Laugh)\ **Replies:** 8\ **Last updated:** [January 5, 2024, 8:56am UTC](https://forums.unrealengine.com/t/binding-to-upathfollowingcomponent-onrequestfinished-event/447698 "2024-01-05T08:56:35Z")
So I’m trying to bind to UPathFollowingComponent::OnRequestFinished, it needs 2 arguments: FAIRequestID , const FPathFollowingResult &. Here’s what I’ve done: In my header I forward declare the appropriate types, and … --- ## [Weird (wrong-ish) error message - child blueprint function override - return node disconnected](https://forums.unrealengine.com/t/weird-wrong-ish-error-message-child-blueprint-function-override-return-node-disconnected/339629)
**Author:** [@TheOriginalArkless](https://forums.unrealengine.com/u/TheOriginalArkless)\ **Replies:** 11\ **Last updated:** [August 29, 2023, 6:16pm UTC](https://forums.unrealengine.com/t/weird-wrong-ish-error-message-child-blueprint-function-override-return-node-disconnected/339629 "2023-08-29T18:16:33Z")
Reproduction steps: Create blueprint containing function that returns a value (boolean works). Create child-blueprint. Override function in child blueprint. Disconnect Execution pin from exit node. Compile Selectin… --- ## [OtherCompilationError (C2064 - C2664)](https://forums.unrealengine.com/t/othercompilationerror-c2064-c2664/787907)
**Author:** [@TijerinArtStudio](https://forums.unrealengine.com/u/TijerinArtStudio)\ **Replies:** 4\ **Last updated:** [March 28, 2023, 2:30pm UTC](https://forums.unrealengine.com/t/othercompilationerror-c2064-c2664/787907 "2023-03-28T14:30:13Z")
Hello, (I’m in Unreal 5.1 and Visual studio 2022 and I’m very novice) I have a very big problem: I need to import some C++ files into unreal engine and every time I want to compile them in unreal engine I get the error… --- ## [Can't include Object.h and Delegate.h](https://forums.unrealengine.com/t/cant-include-object-h-and-delegate-h/429727)
**Author:** [@Anonymous\_e5d5c0bf7d300728867097ff79906dbe](https://forums.unrealengine.com/u/Anonymous_e5d5c0bf7d300728867097ff79906dbe)\ **Replies:** 5\ **Last updated:** [February 28, 2023, 12:58am UTC](https://forums.unrealengine.com/t/cant-include-object-h-and-delegate-h/429727 "2023-02-28T00:58:21Z")
I am trying to compile my plugins for 4.20 But I have fatal errors (can not open include file) on: #include "Object.h" #include "Delegate.h" Any ideas? --- ## [UE4 only works with Visual Studio 2017?](https://forums.unrealengine.com/t/ue4-only-works-with-visual-studio-2017/491401)
**Author:** [@JansenSensei](https://forums.unrealengine.com/u/JansenSensei)\ **Replies:** 2\ **Last updated:** [December 5, 2021, 10:50am UTC](https://forums.unrealengine.com/t/ue4-only-works-with-visual-studio-2017/491401 "2021-12-05T10:50:36Z")
First my plugin couldn’t build because Unity redeclares variables (which it apparently never uses because simply deleted them from the source and everything still compiles fine) Next my plugin failed to build my 2 file… --- ## [After transferring my project from ue4 to ue5, an error related to the new physics engine began to appear during compilation](https://forums.unrealengine.com/t/after-transferring-my-project-from-ue4-to-ue5-an-error-related-to-the-new-physics-engine-began-to-appear-during-compilation/485708)
**Author:** [@BitKovin](https://forums.unrealengine.com/u/BitKovin)\ **Replies:** 0\ **Last updated:** [July 3, 2021, 8:07am UTC](https://forums.unrealengine.com/t/after-transferring-my-project-from-ue4-to-ue5-an-error-related-to-the-new-physics-engine-began-to-appear-during-compilation/485708 "2021-07-03T08:07:10Z")
After transferring my project from ue4 to ue5, an error related to the new physics engine began to appear during compilation. \[link text\]\[2\] --- ## [TArray Find No operator found or suitable conversion](https://forums.unrealengine.com/t/tarray-find-no-operator-found-or-suitable-conversion/290577)
**Author:** [@anonymous\_user\_958fa14f](https://forums.unrealengine.com/u/anonymous_user_958fa14f)\ **Replies:** 9\ **Last updated:** [May 19, 2021, 5:48pm UTC](https://forums.unrealengine.com/t/tarray-find-no-operator-found-or-suitable-conversion/290577 "2021-05-19T17:48:55Z")
I created a custom struct called FItem. Then I declared an Array in my header: TArray\>FItem MyItems; (cant write the arrows here but they are done correctly in my code) Then in my cpp FItem Temp; MyItems.Find(Tem… --- ## [How to compile UnrealCode using CommandLine RunUAT.exe, Android platform?](https://forums.unrealengine.com/t/how-to-compile-unrealcode-using-commandline-runuat-exe-android-platform/464392)
**Author:** [@B.Guihaire](https://forums.unrealengine.com/u/B.Guihaire)\ **Replies:** 0\ **Last updated:** [April 29, 2020, 6:29pm UTC](https://forums.unrealengine.com/t/how-to-compile-unrealcode-using-commandline-runuat-exe-android-platform/464392 "2020-04-29T18:29:05Z")
I am trying to compile UnrealCode using command line: RunUAT.bat BuildGraph -target=“Make Installed Build Win64” -script=Engine/Build/InstalledEngineBuild.xml -set:WithLinuxAArch64=false -set:WithWin32=false -set:WithMa… --- ## [Issue while compilling UE4\_EOS\_Plugin](https://forums.unrealengine.com/t/issue-while-compilling-ue4_eos_plugin/460551)
**Author:** [@Talus](https://forums.unrealengine.com/u/Talus)\ **Replies:** 0\ **Last updated:** [January 14, 2020, 10:00am UTC](https://forums.unrealengine.com/t/issue-while-compilling-ue4_eos_plugin/460551 "2020-01-14T10:00:24Z")
Hi I’m trying to compile https://github.com/gaslightgames/UE4\_EOS\_Plugin under 4.23 I have followed every step on the readme : Copy SDK Generate VS project Build Solution But i get this massive Compilation error log… --- ## [I CAN'T RUNNING MY PROJECT IN NEW VERSION OF ue4](https://forums.unrealengine.com/t/i-cant-running-my-project-in-new-version-of-ue4/460236)
**Author:** [@shovel\_might](https://forums.unrealengine.com/u/shovel_might)\ **Replies:** 5\ **Last updated:** [January 7, 2020, 4:15am UTC](https://forums.unrealengine.com/t/i-cant-running-my-project-in-new-version-of-ue4/460236 "2020-01-07T04:15:00Z")
i want change version of my UE4 4.20 cause i think it wille resolve my bug of NAVMesh, but When i build in 4.23 version he show me this somebody know what i have to do for my project work with 4.23 version ? it s… --- ## [Static library compilation error (openvdb)](https://forums.unrealengine.com/t/static-library-compilation-error-openvdb/450022)
**Author:** [@anonymous\_user\_658cd8fe](https://forums.unrealengine.com/u/anonymous_user_658cd8fe)\ **Replies:** 2\ **Last updated:** [June 3, 2019, 6:45am UTC](https://forums.unrealengine.com/t/static-library-compilation-error-openvdb/450022 "2019-06-03T06:45:32Z")
Hello, I’m trying to include a library into my project (OpenVDB), but I get tons of errors from TBB headers (but not only) when I try to compile (like error C4668: ‘\_\_TBB\_STATISTICS’ is not defined as a preprocessor mac… --- ## [Failed to Connect to Bundle - Unreal 4.18, 4.19 or 4.20](https://forums.unrealengine.com/t/failed-to-connect-to-bundle-unreal-4-18-4-19-or-4-20/426844)
**Author:** [@anonymous\_user\_f787affa](https://forums.unrealengine.com/u/anonymous_user_f787affa)\ **Replies:** 12\ **Last updated:** [April 26, 2019, 7:53pm UTC](https://forums.unrealengine.com/t/failed-to-connect-to-bundle-unreal-4-18-4-19-or-4-20/426844 "2019-04-26T19:53:58Z")
I’ve already tried compiling a clean game in Engine versions 4.18, 4.19 and now at 4.20 and I always find this problem: LogPlayLevel: \[deploy\] Created deployment server. LogPlayLevel: \[DD\] Trying to connect to mobi… --- ## [Can't copmile with Visual Studio from UE4 launcher](https://forums.unrealengine.com/t/cant-copmile-with-visual-studio-from-ue4-launcher/440778)
**Author:** [@anonymous\_user\_acae33df](https://forums.unrealengine.com/u/anonymous_user_acae33df)\ **Replies:** 0\ **Last updated:** [January 7, 2019, 2:24pm UTC](https://forums.unrealengine.com/t/cant-copmile-with-visual-studio-from-ue4-launcher/440778 "2019-01-07T14:24:33Z")
I have VS 2017 and UE4.17 . When I create a new project with C++ and press “create project”, it starts loading and tries to start Visual Studio , but after it shows a big error window like that I tried to find answer… --- ## [Unreal Engine 4 compilation error](https://forums.unrealengine.com/t/unreal-engine-4-compilation-error/440353)
**Author:** [@ECUPROCUDTION](https://forums.unrealengine.com/u/ECUPROCUDTION)\ **Replies:** 0\ **Last updated:** [December 31, 2018, 7:17pm UTC](https://forums.unrealengine.com/t/unreal-engine-4-compilation-error/440353 "2018-12-31T19:17:06Z")
--- ## [Expand Node : generate and call an event](https://forums.unrealengine.com/t/expand-node-generate-and-call-an-event/438936)
**Author:** [@CraftyWeazel](https://forums.unrealengine.com/u/CraftyWeazel)\ **Replies:** 1\ **Last updated:** [December 13, 2018, 11:26pm UTC](https://forums.unrealengine.com/t/expand-node-generate-and-call-an-event/438936 "2018-12-13T23:26:56Z")
Hi there! I’m currently struggling to achieve something with custom K2 nodes. I prefer not to explain why (it would be very long), but I would like to make a node that can expand like shown in the image below, when Expa… --- ## [Project not working after moving it](https://forums.unrealengine.com/t/project-not-working-after-moving-it/434486)
**Author:** [@AgentArachnid66](https://forums.unrealengine.com/u/AgentArachnid66)\ **Replies:** 1\ **Last updated:** [September 25, 2018, 7:34pm UTC](https://forums.unrealengine.com/t/project-not-working-after-moving-it/434486 "2018-09-25T19:34:02Z")
I have recently moved my project to a more capable computer, but in every blueprint I have made, I get compilation errors. In my AI, I cannot cast to my player character. In my Player character, I cannot create a widget.… --- ## [The game fails to compile](https://forums.unrealengine.com/t/the-game-fails-to-compile/434112)
**Author:** [@Speelmaster](https://forums.unrealengine.com/u/Speelmaster)\ **Replies:** 0\ **Last updated:** [September 19, 2018, 11:31pm UTC](https://forums.unrealengine.com/t/the-game-fails-to-compile/434112 "2018-09-19T23:31:30Z")
Every time I attempt to compile my game, it fails stating: PackagingResults: Error: member access into incomplete type ‘UWorld’ PackagingResults: Error: member access into incomplete type ‘UWorld’ PackagingResults: Er… --- ## [UE4.19 compilation error with game configuration](https://forums.unrealengine.com/t/ue4-19-compilation-error-with-game-configuration/425386)
**Author:** [@flewrain](https://forums.unrealengine.com/u/flewrain)\ **Replies:** 2\ **Last updated:** [September 9, 2018, 5:49pm UTC](https://forums.unrealengine.com/t/ue4-19-compilation-error-with-game-configuration/425386 "2018-09-09T17:49:00Z")
When compile with the following configuration: shipping, development, debug, there will be a lot compilation errors, like: \\Engine\\Source\\Editor\\BlueprintGraph\\Classes\\EdGraphSchema\_K2.h(465): error C3668: ‘UEdGraphSche… --- ## [UE4.16 Issue while creating new c++ project (hexadecimal value 0x00, is an invalid character)](https://forums.unrealengine.com/t/ue4-16-issue-while-creating-new-c-project-hexadecimal-value-0x00-is-an-invalid-character/393435)
**Author:** [@anonymous\_user\_79a3d3f0](https://forums.unrealengine.com/u/anonymous_user_79a3d3f0)\ **Replies:** 1\ **Last updated:** [July 4, 2018, 8:34am UTC](https://forums.unrealengine.com/t/ue4-16-issue-while-creating-new-c-project-hexadecimal-value-0x00-is-an-invalid-character/393435 "2018-07-04T08:34:33Z")
Hello, I’m running UE4.15 & UE4.16 on my machine. UE4.15 works well but i’m unable to create new c++ project in UE4.16. It gives me error. please find the attached screenshot for the error. Is multiple versions of eng… --- ## [UBT compile command running from C++ doesn't produce same results as command line](https://forums.unrealengine.com/t/ubt-compile-command-running-from-c-doesnt-produce-same-results-as-command-line/391743)
**Author:** [@anonymous\_user\_d4efcd70](https://forums.unrealengine.com/u/anonymous_user_d4efcd70)\ **Replies:** 0\ **Last updated:** [April 24, 2017, 2:48am UTC](https://forums.unrealengine.com/t/ubt-compile-command-running-from-c-doesnt-produce-same-results-as-command-line/391743 "2017-04-24T02:48:41Z")
I’m using CreateProcess to run UBT whenever my game documentation code generator generates new C++ files. I’m passing in the path to UBT, and the argument string to CreateProcess. Generating the build files works without… --- ## [Intermediate directory not included in VisualStudio project generation](https://forums.unrealengine.com/t/intermediate-directory-not-included-in-visualstudio-project-generation/390814)
**Author:** [@Thiryn](https://forums.unrealengine.com/u/Thiryn)\ **Replies:** 6\ **Last updated:** [April 14, 2017, 11:49am UTC](https://forums.unrealengine.com/t/intermediate-directory-not-included-in-visualstudio-project-generation/390814 "2017-04-14T11:49:25Z")
Hi! I am trying to include my c++ plugin into my project, but when I “Generate Visual Studio Project Files” the “\*.generate” files are created, but not included. I have a Header named “Avatar.h”, the “Avatar.generated.… --- ## [Compilation error with damage.h](https://forums.unrealengine.com/t/compilation-error-with-damage-h/383032)
**Author:** [@Cedric\_Schaff](https://forums.unrealengine.com/u/Cedric_Schaff)\ **Replies:** 2\ **Last updated:** [January 26, 2017, 5:20pm UTC](https://forums.unrealengine.com/t/compilation-error-with-damage-h/383032 "2017-01-26T17:20:39Z")
Hello, I have this error when i try to build the project: Error C2143 syntax error: missing ‘;’ before ‘’ ShipsRD3 C:\\Program Files (x86)\\Epic Games\\4.14\\Engine\\Source\\Runtime\\Engine\\Classes\\GameFramework\\DamageType.h … --- ## [Constant crashes while compiling](https://forums.unrealengine.com/t/constant-crashes-while-compiling/379352)
**Author:** [@CyanBalloon](https://forums.unrealengine.com/u/CyanBalloon)\ **Replies:** 3\ **Last updated:** [December 15, 2016, 9:39pm UTC](https://forums.unrealengine.com/t/constant-crashes-while-compiling/379352 "2016-12-15T21:39:39Z")
Hi, Ever since 14.1, I have been pretty much unable to work on our project at all. Every 5 compilations or so, the engine crash with this error: Crash log (relevant information): \[here\]\[2\] In the log, it says EXCEP… [Next page](https://forums.unrealengine.com/tag/compilation-error/5345.md?match_all_tags=true&page=1&tags%5B%5D=compilation-error)