launcher starts crashing all the time

Development Getting Started & Setup
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1

Hello, i cant open unreal engine launcher, its stuck at 9% and keep crushing all the time.
Any idea how i can fix it? i use 5.5.4. Thanks!

LoginId:xxxx
EpicAccountId:xxxx

Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Developer\DerivedDataCache\Private\DerivedDataBackends.cpp] [Line: 208]
Unable to use default cache graph ‘InstalledDerivedDataBackendGraph’ because there are no writable nodes available.Add -DDC-ForceMemoryCache to the command line to bypass this if you need access to the editor settings to fix the cache configuration.

UnrealEditor_DerivedDataCache
UnrealEditor_DerivedDataCache
UnrealEditor_DerivedDataCache
UnrealEditor_DerivedDataCache
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
UnrealEditor
kernel32
ntdll

2

i dont use VPN
i delete C:\Program Files\Epic Games\UE_5.4\Engine\DerivedDataCache
Compressed.ddp and verify files again via epic game launcher

still dont work

3

Hi there @Shinek

The cache you’ll want to clear is likely in a location like this: C:\Users\YourUsername\AppData\Local\UnrealEngine\5.4\DerivedDataCache

4

its 5.5 ver my mistake, i copy paste that from other topic.

Anyway its not help, i just cleared, try again and nothing happend

5

Hm, I see. How much disk space do you have on that drive?

6

@FrostyJas

Its something like 800GB, its fresh 1TB m.2 ssd

7

Good deal. Are you able to open UE at all or is it crashing anytime you try to open?

8

@FrostyJas

Yes, no matter how many times i try to delete that addpada folder and verify, its still the same crash

9

Ok i found in here

When i add that to shortcut -ddc=NoZenLocalFallback then its wake up without any problems. but now i wonder if it not couse any other problems…

10

I’ve saw people use it and have some issues with assets not loading and such. I was going to recommend moving your cache directory to something like C:UnrealEngine if it didn’t work.

11

Yeah that works!

then i delete -ddc=NoZenLocalFallback from shortcut and restart editor.

Thanks! Do you know what was the reason for this perturbation?

12

I do not know the reason off-hand. But, I’m glad it fixed it!