Crashing when trying to open level

Development Modding ARK: Survival Evolved
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1

Im trying to open The Island map and getting this crash. It freezes for a bit tries to load and then crashes later.

[spoiler]Assertion failed: Index>=0 && Index<NumBits [File:H:\Engine\Source\Runtime\Core\Public\Containers\BitArray.h] [Line: 472]

VERSION: 0.0
KERNELBASE.dll!UnknownFunction (0x00007ffd384b7788) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cd066ad) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cbed258) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cbc1902) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffd0a1d8508) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffd0a42ad12) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffd0a48c0ef) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffd0a1354e3) + 0 bytes [UnknownFile:0]
UE4Editor-AssetTools.dll!UnknownFunction (0x00007ffcf5b70b33) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ffd0a9016b7) + 0 bytes [UnknownFile:0]
UE4Editor-AssetTools.dll!UnknownFunction (0x00007ffcf5af3449) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf23fc884) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf2387c53) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf23918c8) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf2408614) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf2380d26) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf238f92b) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf238d016) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf241d4cf) + 0 bytes [UnknownFile:0]
UE4Editor-ContentBrowser.dll!UnknownFunction (0x00007ffcf240885f) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffd0bd1c5e5) + 0 bytes [UnknownFile:0]
UE4Editor-Slate.dll!UnknownFunction (0x00007ffd0bd08550) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cc64958) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cc42ddb) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cc65c79) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cc3cb82) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffd38bd1c24) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffd38bd156c) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ffd0cc669d6) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff7b960a713) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff7b95ff91f) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff7b95ff98a) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff7b960bf50) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff7b960ce99) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ffd38da8364) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd3b1970d1) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffd3b1970d1) + 0 bytes [UnknownFile:0]
[/spoiler]

2

I’m getting the exact same error when opening a level (like TheIsland etc). Any clues as to how to solve this?

3

This just happened to me yesterday. My issue was caused by a rogue BP in the actual file system. Check your project folder and go through to see if you have any unknown files. Mine was a buff bp with _2 on the end of the file name.

My correct buff: Buff_myBuff.uasset
Rogue buff file: Buff_myBuff_2.uasset

Once I removed that file, I was able to edit BPs and run the level.