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[Closed] Failed to load font data warning on startup

I recently downloaded and compiled UE4 for Linux, everything went smoothly, all dependencies installed (as far as I know, etc). When I go to launch the editor from inside the Engine/Binaries/Linux directory, I get the following warning messages (I provided the warnings and full startup log in an external link to avoid clutter of the page):

I'm not sure what most of these errors are, and if they are even an issue, but there are a few that are causing me problems so far. These are the failed to load font data errors:

 [2015.03.12-01.19.59:243][ 0]LogSlate:Warning: Failed to load font data from '../../../Engine/Content/Slate/Fonts/Roboto-Italic.ttf'
 [2015.03.12-01.20.03:342][ 0]LogStreaming:Warning: Failed to read file '../../../Engine/Content/Editor/Slate//GameProjectDialog/Tab_Background.png' error.

and (after other logs)

 [2015.03.12-01.20.28:196][ 0]LogSlate:Warning: Failed to load font data from '../../../Engine/Content/Editor/Slate/Fonts/Roboto-Regular.ttf'
 [2015.03.12-01.20.28:208][ 0]LogSlate:Warning: Failed to load font data from '../../../Engine/Content/Editor/Slate/Fonts/Roboto-Bold.ttf'

My engine still starts up and loads the window after these warnings, but as you can see from the image below, the characters are replaced with square placeholders, because, as the warnings said, the font data could not be loaded. Also, the window can not be moved or dragged around, but the buttons at the top still work.

UE4 editor no font

An ls of the Engine/Content/Editor/Slate/Fonts gives me this, confirming that the fonts that were reported missing are in fact missing:


And an ls of Engine/Content/Editor/Slate/GameProjectDialog gives me this:


The error for this directory says Tab_Background.png does not exist, which is true, because it is in lower case. I renamed it to match the error and now there is no warning for that resource, also the window is now draggable.

As for the font errors, I am not sure how to approach this. I suppose I could find the font files online and move them into those directories, but I don't want to mess anything up. Anyone else come across this problem and solve it? I am curious as to why the font files weren't included. I downloaded straight from the Git repo.

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ue4-crash.png (925.9 kB)
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asked Mar 12 '15 at 01:57 AM in Linux

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The question has been closed Mar 24 '15 at 02:21 PM by amigo for the following reason:

The question is answered, right answer was accepted

1 answer: sort voted first


Missing fonts is generally a benign problem as we haven't seen any issues with it. You can download those missing fonts and add them yourself.

Tab_Background.png issue was corrected in the epic/master (actually I was the one who sent a PR).

The issue you are having with the Editor, as per the image you posted, has already been answered here on the AH:

https://answers.unrealengine.com/questions/117323/editor-rendering-problems.html https://answers.unrealengine.com/questions/161055/font-problem-with-ue4editor.html

Lastly, I suggest running our community branch available in my repo at 3dluvr/4.7-linux, as it contains fixes which greatly improve the experience that are not available in epic/4.7

Once 4.8 is released that won't be necessary, but for the time being, for Linux, 3dluvr/4.7-linux is the best bet.

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answered Mar 12 '15 at 12:35 PM

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avatar image samrapaport Mar 12 '15 at 02:21 PM

thanks for you help, I will check out those resources

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