Fatal error: [File:D:\build\++Fortnite\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp] [Line: 273]

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Other

Summary

Making edit to rocket racing map. was having issues with live version of map secondary tracks making players “missed checkpoint” even though they had not passed it yet.

So made edit to remove secondary tracks and simplify track to primary only track. All was great… then had UEFN crash (has never happened before in any of my 15+ maps)

then went to re-open map after crash and UEFN now crashes when trying to load this map in UEFN and will not open at all. (other maps open fine)

The crash report im getting for this map is as follows…

Fatal error: [File:D:\build++Fortnite\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\Obj.cpp] [Line: 273]
Renaming an object (BP_DelMar_DesertLight_C_C /MicroRacers/MicroRacers.MicroRacers:PersistentLevel.Light_GEN_VARIABLE_BP_DelMar_DesertLight_C_C_CAT_2147483646) on top of an existing object (BP_DelMar_DesertLight_C_C /MicroRacers/MicroRacers.MicroRacers:PersistentLevel.DESTROYED_BP_DelMar_DesertLight_C_C_CHILDACTOR_2147483647) is not allowed

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kernel32
ntdll

Steps to Reproduce

open UEFN, click on my existing rocket racing map and UEFN crashes.

Expected Result

would expect map to open fine like all others

Observed Result

loads to around 86 percent then UEFN crash

Platform(s)

pc

Additional Notes

classic, as map was starting to gain traction and just wanted to fix checkpoint bug… now this…

MicroRacers is the file name of this map… (fyi)

I’m fairly confused at this part in particular…?

Renaming an object
(BP_DelMar_DesertLight_C_C/MicroRacers/MicroRacers.MicroRacers:PersistentLevel.Light_GEN_VARIABLE_BP_DelMar_DesertLight_C_C_CAT_2147483646)

on top of an existing object

(BP_DelMar_DesertLight_C_C/MicroRacers/MicroRacers.MicroRacers:PersistentLevel.DESTROYED_BP_DelMar_DesertLight_C_C_CHILDACTOR_2147483647)

is not allowed

iv not dont any of this my self, its some thing uefn has done… i just cant work out how to fix

yea cool… map is on discovery and i cant edit it…

Were you able to find a fix for this? I have basically the same error.

I am able to get the map loaded by deleting the main file in file explorer, and then syncing after. But now when making any changes, the map will crash with that same bug. I can still load my map after, but it will crash during session.

no fix. all other maps are fine… just this one map is now bugged and no one from epic will help at all? this map is bugged and can not be opened in uefn at all. so frustrating. :frowning:

1 Like

Thanks for reporting this! Shared it with the team directly.

was the error ever resolved?
I’m getting the same issue on my side now as well