# About Build Error C4828

**URL:** <https://forums.unrealengine.com/t/about-build-error-c4828/1409220>\
**Category:** Platform & Builds\
**Tags:** unreal-engine, build-failed, question\
**Created:** [November 21, 2023, 2:27pm UTC](https://forums.unrealengine.com/t/about-build-error-c4828/1409220 "2023-11-21T14:27:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![fedy3234](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@fedy3234](https://forums.unrealengine.com/u/fedy3234)\
**Post date:** [November 21, 2023, 2:27pm UTC](https://forums.unrealengine.com/t/about-build-error-c4828/1409220/1 "2023-11-21T14:27:12Z")

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While building for a specific platform, error C4828 appears.  
This error is \>\> The file contains a character starting at offset 0xvalue that is illegal in the current source character set (codepage number).  
Of course, this can be solved by saving the source code in UTF-8 format, but it cannot be adopted because problems arise during the process of merging with the existing SVN.

I added the command line below to BuildTool, but it was the same.  
"/source-charset:utf-8 "  
“/execution-charset:utf-8”

Is there any way?

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**Author:** ![FrostyJas](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/frostyjas/32/1194640_2.png) [@FrostyJas](https://forums.unrealengine.com/u/FrostyJas)\
**Post date:** [November 22, 2023, 3:32am UTC](https://forums.unrealengine.com/t/about-build-error-c4828/1409220/2 "2023-11-22T03:32:59Z")

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Greetings @fedy3234

Welcome to the Unreal Engine Community Forums! This error is generally due to invalid characters. Take a peek at [this post](https://forums.unrealengine.com/t/have-you-ever-met-warning-c4828/401872). This should explain more about what you’re looking at and how to fix it. I hope that this helps!