# Error when building the project!!! **URL:** \ **Category:** Blueprint\ **Tags:** unreal-engine, question\ **Created:** [October 31, 2025, 9:56am UTC](https://forums.unrealengine.com/t/error-when-building-the-project/2670452 "2025-10-31T09:56:15Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![BRGEzedeRocco](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/brgezederocco/32/1216890_2.png) [@BRGEzedeRocco](https://forums.unrealengine.com/u/BRGEzedeRocco)\ **Post date:** [October 31, 2025, 1:52pm UTC](https://forums.unrealengine.com/t/error-when-building-the-project/2670452/4 "2025-10-31T13:52:39Z")
From what I’ve researched,If you mean that your project or its folders contain characters outside the standard range (like accents, umlauts, or letters from alphabets such as Russian or German), it’s very likely that Unreal will fail to build or package. It’s best to make sure the entire path, from the user name to the project folder, uses only letters A-Z and numbers. There’s actually an older post that mentions this issue too. > [@Build error with accented characters on file path](https://forums.unrealengine.com/t/build-error-with-accented-characters-on-file-path/341908): > > Hello, just submitting a bug that is in the latest engine release (4.10.1). I was trying create and build a new C++ project in the default project location (C:\Users\username\Documents…etc) and I was getting a compile error: Turns out it was my Windows username which contains an accented character (André) that was causing this issue. The build system is not escaping it correctly (if you look in the pic you’ll see Andr? in the path) and then the compiler can’t find the… --- _[View the full topic](https://forums.unrealengine.com/t/error-when-building-the-project/2670452)._