# The project could not be compiled. Why?

**URL:** <https://forums.unrealengine.com/t/the-project-could-not-be-compiled-why/366014>\
**Category:** Pipeline & Plugins\
**Tags:** unreal-engine, Visual-Studio, UE4, CPP, question\
**Created:** [August 3, 2016, 4:27pm UTC](https://forums.unrealengine.com/t/the-project-could-not-be-compiled-why/366014 "2016-08-03T16:27:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![DeOlijus](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DeOlijus](https://forums.unrealengine.com/u/DeOlijus)\
**Post date:** [August 3, 2016, 4:27pm UTC](https://forums.unrealengine.com/t/the-project-could-not-be-compiled-why/366014/1 "2016-08-03T16:27:47Z")

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I just got Unreal Engine 4.12.5. Unreal prompted me to download Visual Studio 2015 and I did. However, I am unable to resolve this error whenever I start new c++ project. I have been unable to solve this error for a almost 2-3 weeks and I could not find a suitable solution.

I have tried uninstalling and reinstalling visual studio but it does not help. I don’t know what is missing or what to remove.

 ![101262-unrealerror.png](https://d3kjluh73b9h9o.cloudfront.net/original/4X/f/0/3/f031b42dff35285a20e9297f7204a156589ad2d7.png)

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**Author:** ![anonymous\_user\_2b03d27c](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@anonymous\_user\_2b03d27c](https://forums.unrealengine.com/u/anonymous_user_2b03d27c)\
**Post date:** [August 3, 2016, 5:05pm UTC](https://forums.unrealengine.com/t/the-project-could-not-be-compiled-why/366014/2 "2016-08-03T17:05:58Z")

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Hey DeOlijus-

The RC1015 error shown in the error message likely indicates that you are missing the Windows SDK on your computer. You can find more information on the RC1015 error along with a link to download the Windows 7 SDK on the wiki page linked below. Keep in mind if you are using Windows 8 or Windows 10 you will need to get the appropriate SDK.

> **[A new, community-hosted Unreal Engine Wiki](https://forums.unrealengine.com/t/a-new-community-hosted-unreal-engine-wiki/141494)**
>
> After over a year in maintenance mode, the official Unreal Engine Wiki is now permanently offline. These resources now live on a new community-run Unreal Engine Community Wiki — https://unrealcommunity.wiki/! You will be able to find content from...

Cheers

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<div class="post-metadata">

**Author:** ![DeOlijus](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DeOlijus](https://forums.unrealengine.com/u/DeOlijus)\
**Post date:** [August 8, 2016, 1:47pm UTC](https://forums.unrealengine.com/t/the-project-could-not-be-compiled-why/366014/3 "2016-08-08T13:47:56Z")

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Awesome! Thank you. I had to make sure to uninstall any kind of Visual studio software that was previously installed. But after that everything worked.