Failed to find object 'Class None.'

Development Platform & Builds
, ,
1

Here is the end of the startup log:

MapCheck: New page: Apartment - 15 Oct 2014 14:26:42
MapCheck: Info Map check complete: 0 Error(s), 0 Warning(s), took 104.183ms to complete.
LogFileHelpers: Loading map 'Apartment' took 1.507
LogCollectionManager: Loaded 0 collections in 0.000753 seconds
LogCrashTracker: Crashtracker disabled due to settings.
LogUObjectGlobals:Warning: Failed to find object 'Class None.'
LogLoad: Full Startup: 17.31 seconds (BP compile: 2.05 seconds)

I have no idea what that ‘Class None’ is referring to. I checked all the tabs in the Message Log but nothing relevant shows up there. It doesn’t depend on the map the editor loads on startup. How could I find out exactly what goes wrong?

2

@ZoltanE did you happen to sort this out? I’m seeing this warning too.

3

No but I noticed that it’s present even in a new project without starter content so it is an issue of the engine release. It will probably go away in the next build.

4

Hey ZoltanE-

Wat version of the engine are you working in? Also, are you running the engine from the launcher or through source code from GitHub?

1 Like
5

If it’s of any use, I’m using a source build of 4.5.1, SHA ad428a1.

1 Like
6

I’m on 4.5.1-2336687 binary release.

7

For me, it’s when I open the editor. My project is mostly C++ but there are a few blueprints. It might have occurred after I renamed one of them, but I honestly wasn’t paying close enough attention to the startup warnings. It doesn’t seem to have any adverse effects on my project but I’m happy to supply an archive of my project or try something out to help narrow down the case.

8

It sounds like a blueprint that is supposed to reference a class or an object of a certain class is not getting set properly somewhere. When exactly does this warning message occur? Are you seeing it when you open the editor or when running Play in editor, etc.?

9

It shows up as the editor is starting even in a new, empty project without starter content. Both BP and C++ templates seem to be affected.

10

I’ve been getting the same error since 4.5 - it happens even when opening a new blank project.

11

Hey guys-

Thanks for the information for this issue. I was able to locate the warning message in my own project and have submitted it for further investigation (UE-5528).

Cheers

12

any updates on this ?

13

Hey -

The referenced bug number is still open for investigation however the warning message reported here does not affect creating / loading / opening a project in any way.

14

Any updates?

15

Hey IvanRodriguez-

The bug report for this issue is still open in our database and unfortunately there is no way to determine exactly when a fix will go in. Since this is simply a warning message and does not seem to affect creating/loading/opening a project it should be safe to ignore.

16

This BUG still exist in UE 4.12.5. Change category to BUG

17

Hey AngelTsvetkov-

This issue appears to have been fixed internally as the message was no longer appearing, and it should be included in a future update to the engine. You can track the issue publicly here: Unreal Engine Issues and Bug Tracker (UE-5528)

18

This also happens when using a First Person default blueprint class with starter content, when you try to make a new C++ class. This is preventing me from being able to create a new character blueprint that is C++.

19

Hey Tofum4n-

The error message was printed however I was still able to create a character class as well as a blueprint based off of my custom character class. Can you provide the error message you are receiving and exactly what you are doing when the error occurs?

20

Issue tracker states “No-longer occurs in 4.13” but I’m seeing the warning still in my 4.13 project.

This project was imported from a previous version of the editor.