# Error compiling using modding tool to upload avatar tool **URL:** \ **Category:** Unreal Engine Plugin\ **Tags:** unreal-engine, modding, question\ **Created:** [May 15, 2025, 7:16pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967 "2025-05-15T19:16:32Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Cory\_Matthews](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/cory_matthews/32/3096_2.png) [@Cory\_Matthews](https://forum.convai.com/u/Cory_Matthews)\ **Post date:** [May 15, 2025, 7:16pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/1 "2025-05-15T19:16:32Z")
Hi, I’m having trouble compiling with the Convai Modding Tool. I’m attaching the log below in case someone can help me figure out what’s going on. Thanks in advance! [Project Default.txt](https://forum.convai.com/uploads/short-url/ahbQHnq0p8pIF16lkEXfKggWzEw.txt) (14.2 KB) ---
**Author:** ![Cory\_Matthews](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/cory_matthews/32/3096_2.png) [@Cory\_Matthews](https://forum.convai.com/u/Cory_Matthews)\ **Post date:** [May 15, 2025, 9:52pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/2 "2025-05-15T21:52:51Z")
@K3 anybody? 😃😃 ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [May 15, 2025, 9:58pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/3 "2025-05-15T21:58:59Z")
We’ll check as soon as we can. ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [May 15, 2025, 10:05pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/4 "2025-05-15T22:05:05Z")
Where are you getting this error? ---
**Author:** ![Cory\_Matthews](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/cory_matthews/32/3096_2.png) [@Cory\_Matthews](https://forum.convai.com/u/Cory_Matthews)\ **Post date:** [May 15, 2025, 11:55pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/5 "2025-05-15T23:55:36Z")
I’m getting this error when trying to compile a project using the **Convai Modding Tool** The build process starts, but then fails partway through. I’ve attached the full log above. Let me know if you need any other info! 🙌 ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [May 16, 2025, 12:04am UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/6 "2025-05-16T00:04:38Z")
Why do you compile? ---
**Author:** ![K3](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/k3/32/2611_2.png) [@K3](https://forum.convai.com/u/K3)\ **Post date:** [May 16, 2025, 12:09am UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/7 "2025-05-16T00:09:02Z")
Please follow the documentation. ---
**Author:** ![Cory\_Matthews](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/cory_matthews/32/3096_2.png) [@Cory\_Matthews](https://forum.convai.com/u/Cory_Matthews)\ **Post date:** [May 16, 2025, 12:32am UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/8 "2025-05-16T00:32:07Z")
Just to clarify — I wasn’t trying to compile manually. The error shows up automatically when the prompt opens after running the `.exe` from the Modding Tool. ---
**Author:** ![Anmol](https://yyz2.discourse-cdn.com/flex004/user_avatar/forum.convai.com/anmol/32/4753_2.png) [@Anmol](https://forum.convai.com/u/Anmol)\ **Post date:** [May 16, 2025, 9:01am UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/9 "2025-05-16T09:01:07Z")
The error is coming from the engine itself. Try compiling another project to see if the error occurs there as well. I suspect something is wrong with the engine installation itself. You can also see in the logs you shared: ```auto C:\Program Files\Epic Games\UE_5.3\Engine\Source\Runtime\Core\Public\Experimental\ConcurrentLinearAllocator.h(31): error C4668: '__has_feature' is not defined as a preprocessor macro, replacing with '0' for '#if/#elif' ``` Try updating your NuGet packages and verifying your Visual Studio version to see if that resolves the issue. ---
**Author:** ![system](https://canada1.discourse-cdn.com/flex004/uploads/convai/original/1X/e60ef96aa7334c5ccf6682f6c6dbc20fcfa96b49.png) [@system](https://forum.convai.com/u/system)\ **Post date:** [September 3, 2025, 12:36pm UTC](https://forum.convai.com/t/error-compiling-using-modding-tool-to-upload-avatar-tool/3967/10 "2025-09-03T12:36:09Z")
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