projects corrupted: Copying assembly.....UnityEngine.TestRunner.dll' failed
A few days ago I switched from editing a script in Visual Studio back to Unity (2019.2.10), using HDRP which crashed Unity - when I opened the project again, only a few items in my scene were visible at all, with pink error materials, most items were not visible in the scene and all references to any scripts showed missing script / not monobehaviour.
In the console, I have these two errors:
Copying assembly from 'Temp/UnityEngine.UI.dll' to 'Library/ScriptAssemblies/UnityEngine.UI.dll' failed
Copying assembly from 'Temp/UnityEngine.TestRunner.dll' to 'Library/ScriptAssemblies/UnityEngine.TestRunner.dll' failed
I tried reinstalling unity, installing a newer version (unity 2019.2.10 to 2019.2.11, also tried with latest Beta) and have same issue and errors with the project folder. I have a backup folder from a week ago, which when I open it on the same PC results in the same error - I also see that the \Library\ScriptAssemblies folder becomes empty after being opened in unity on this PC. I've tried copy pasting everything from that folder back in after opening, no change.
I opened the backup folder on a different PC with 2019.2.11 and was able to open it as normal - however the folder that appears to have been corrupted on the other PC results in the same issue on either PC.
It appears that opening any of my projects (pre-crash and post-crash) results in them being irretrievably corrupted on my main desktop - my other laptop can run a pre-crash project no problem, but that laptop is not good enough to run VR, so I can't use it for developing this project.
I've tried all of the fixes provided by other users here: Nothing works at all:
I have already uninstalled and deleted both versions of Unity, looked for key in registry (found nothing), deleted everything in a unity folder in appdata folder
tried reimporting all assets, resetting packages to default
I have also tried disabling antivirus, scanning for viruses, (found a bit miner but still having same problem)
ensuring I have full admin control of the folders in my project
deleting temp folders
starting a new project and importing a custom package that I exported which included most of the assets in my project, (scripts, scene, models, prefabs)- importing the asset package causes the same issue (on my desktop, not on my laptop.)
opening visual studio and editing a script then going back to unity, no change.
I'm not using collaborate or multiplayer package.
The problem never goes away by restarting unity
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My next option is to reinstall windows, but as I seem to have removed unity fully already I don't know will this definitely fix things - if anyone has any other solutions please help! I have filed a bug report also.
Answer by NathanChechock · Apr 23, 2020 at 02:31 AM
hey ciaratamay, I'm having the same issue. hoping it worked out for you in the end. and how did you fix it. iv had it one other time and had to re format.