EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000070

General Issues and Bug Reporting
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1

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

Stability

Summary

So i migrate earlier today assets from one map to the other

Since it was crashing after Migrate i delete the assets again after it crashed when i wanted to edit. (Texturechanger Material)

And keept working after a few hours and recreate the texture in the map.

After i worked on other maps and i wanted to go back to that Map Name is PitMedival.
And UEFN crash on startup and the Project does not open anymore.

That is the Crash

Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x0000000000000070

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kernel32
ntdll

Steps to Reproduce

Migrate an Material and after it crash
After deleted and reopen after check in, UEFN Crash

Expected Result

UEFN Project open

Observed Result

UEFN Crash

Platform(s)

PC

Additional Notes

CrashContext.zip - Google Drive Crash Report

2

is there not a way to load a older revision Check in what should solve the Problem

3

Thank you Rob H. and the Epic team for that information

Folks have reported that a couple people seeing this have been able to resolve by deleting the DDC folder. No expected danger in removing the folder.

C:/Users//AppData/Local/UnrealEngine/Common/DerivedDataCache

4

Im having the same problems, it seems to happen with material parameter collection nodes in you materials, i have to remove them before migrating.