The following assets failed to save correctly:

I made a slight change just now to a map, just selecting and copying a group of 16 trigger boxes, and got this message.

The following assets failed to save correctly:
/Game/StarterContent/Maps/Minimal_Default

I have no idea what I’m doing, of course, but how do I proceed given that I cannot save the map?

Are you editing your own project? This kind of error happens to me when I open a project from another user.

I managed to get this fixed, but rather than just ignoring it and moving on, I’m posting the solution here.

I opened up task manager and force-closed the unreal engine process.

Then I created a copy of the map I was editing, deleted the original (making sure it wasn’t in use anymore) and then renamed the copy to match the original name.

When I opened up the editor again, everything was fixed and I could save again.

I tried a few other things in the process, but this was what eventually fixed it.

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Thanks for the feedback. I was in fact editing my own project, but thanks for the assist, you gave me some ideas on where the problem might be coming from.

Excellent, you can mark the question as resolved :wink:

I had two files with this problem, tried the solution described by TheWrathOfGod in one file, for testing purposes, and it worked… then I tried to save the other file without replacing it and it saved without problem, it was fixed too… I figure my problem was because I had another “ghost” Unreal Engine process opened in the background, that I was only able to see in the task manager, thanks

Wow, this solution is perfect for solving corrupted blueprints!

Today is 2022.04.09 and I am still seeing this stupid bug in the newst Unreal 5.
What is happening to this engine?

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I had the same issue that blown up my mind. Is started from not being able to render in MRQ. With this error crashing all the time:

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 934]
Rendering thread exception:
Fatal error!

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000008000000

0x00007ffa5fbb6fbb ucrtbase.dll!UnknownFunction []
0x00007ffa5fb9e45c ucrtbase.dll!UnknownFunction []
0x00007ffa5fb9dfca ucrtbase.dll!UnknownFunction []
0x00007ffa1e56bec1 UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa1e5508ac UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa232baca3 UnrealEditor-RenderCore.dll!UnknownFunction []
0x00007ffa2324467f UnrealEditor-RenderCore.dll!UnknownFunction []
0x00007ff9f27cedee UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f2841de7 UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f28390a8 UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f2755400 UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f3221d19 UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f31f03a2 UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f32096ba UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ff9f32111fa UnrealEditor-Renderer.dll!UnknownFunction []
0x00007ffa1e2c3a9d UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa1e2c3f3e UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa1e2c42e1 UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa2319976b UnrealEditor-RenderCore.dll!UnknownFunction []
0x00007ffa2319d158 UnrealEditor-RenderCore.dll!UnknownFunction []
0x00007ffa1e997a2b UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa1e990a90 UnrealEditor-Core.dll!UnknownFunction []
0x00007ffa60cf7034 KERNEL32.DLL!UnknownFunction []
0x00007ffa61da2651 ntdll.dll!UnknownFunction []

Then I tried to save map as another one - It gave me error that engine could not save the map without mistakes.

THE SOLUTION WAS LANDSCAPE.

This can be fixed if you simply open your task manager, see if another instance of Unreal editor is in the background working and ending the task. however must be careful to not end the current Unreal editor or you’d remove everything you’ve done since your last successful save. To my case however, this error just eccured. You have to literally simply read the error message. click on the message, Ctrl+C to copy and paste in a notepad and read through. My fix was that the messaged was saying: inside the level blueprint of the current level, some assets are being referenced, however those exist in another “LEVEL”. those assets in the other level are apparently linked to the level blueprint of the current level. This happened to me simply because I copied everything from the level blueprint of an old “Level” and pasted to the level blueprint of my current level. if you notice, by pasting it says: some assets can’t be pasted accordingly or something like that. so simply select the assets in your current level and get reference in the level blueprint, pretty much replacing. and keep saving to get new messages to fix, such thing as saving is critical and if leaving it unsuccessful, you might lose a lot of progress!

Hey, This is not entirely correct. You don’t need to delete anything.
Necessary:

  1. Open the properties of the folder where the project is stored.
  2. On the security tab, select the current user, and then set full access.
  3. If there is no user, then add and grant access.
    (If necessary, use the help on how to add rights to the folder and all items in it)