[SOLVED] Copying assembly 'Temp/Assembly-CSharp.dll' failed

I have the same issue, but I am using Avira Antivirus. But I don't know how to tell Avira, that it is nothing dangerous, so that I can update my API. Does anyone know how to do this? Thanks for your help.

 

I store my projects on a Dropbox shared folder so I can access them from multiple machines and get this error. It goes away if I pause syncing but then I need to remember to turn syncing on again when I finish and with my memory that rarely happens.

 

Stuck with the same problem. makes using Unity not possible. I tried all the suggested solutions. I am running a vanilla windows system (fresh setup) with the project white listed in the windows defender. Other apps installed are just: visual studio code and affinity designer.

 

Had the same issue, but I have the project in Dropbox. I paused sync and restarted the unity project and no more compile error.

 

Solution No 1 : Restart Unity (Take time)
Solution No 2 : Reimport project (Take time)

Solution No 3 : Make some changes in any script then save it, go to unity (error won't be there) go to script again undo changes save again.. Welcome

 

I'm not even having a script yet, The problem's occuring even in a newly created project.

 

@SugoiDev in reference to https://forum.unity.com/threads/cop...mp-to-library-scriptassemblies-failed.533904/, have you ever gotten a response from Unity regarding your stress testing and the resulting bugs?
Getting "Copying assembly failed" across 2019.4 LTS, 2020.1, 2020.2 still, nearly on every 2nd recompile in complex projects (without weird AntiVir interference and with Defender exclusions in place).

 

Got this problem as well. Means I have to restart the editor many times. It really disrupts the workflow. Unity 2019.3.14f1

 

[QUOTE = "wolfy2, publicación: 5500591, miembro: 974380"] Curiosamente, resultó ser cierto. Malewarebytes encontró al minero y el problema se resolvió después de la cuarentena. [/ QUOTE]
Yo hice lo de Reimport funciono pero volvio que puedo hacer con que herramienta buscan para encontrar Malware yo probe con Eset pero nose sigue igual que herramienta usaste??

 

[QUOTE = "alstovbur, post: 5731429, member: 4893928"] Tuve el mismo problema. Probé todo. Finalmente, revisé PC por Malwarebytes, ¡encontré 4 mineros y se solucionó un problema! [/ QUOTE]
Con que herramienta revisaste si habia malware
porfa

 

I would like to know why so many Unity users have bitcoin malware on their systems. I suspect it's being distributed through the asset store.

 

where is the script FOLDER to reimport? i right clicked on the script name in INSPECTOR, and reimport wasnt there?

 

@richardgengle you can select the script asset (the file) or a folder there in the Project Window and click reimport there.

 

Remove JetBrains' Rider package from project.

Error went away during compilation

UPDATE: Problem returned

 

yes just go to windows firewall and allow connection of all disabled unity editoor orr hub

 

I'm embarrassed to say that I had a trojan type bitcoin miner on one of my work stations. When removed with malwarebytes the dll issue was resolved.

 

Same

 

Yes This is Worked for me.

Thanks a lot buddy !!!!

 

The only thing that works is to restart the Unity.

 

Thanks bro

 

Same for me but with Google Drive for Desktop.

 

It was the dropbox issue for me. I found a way to ignore my Unity project in Dropbox so that I can maintain my folder structure without dropbox interfering with Unity. Worked like a charm. https://help.dropbox.com/files-fold...an set a file,count toward your storage space.

 

Malwarebytes

 

Worked for me! Thank you!!

 

My friend had this issue, Malwarebytes caught a Malware.AI that was causing this issue. Deleting the quarantined file solved it.