koobas.hobune.stream
Blank Console Error on Empty Project with a Single C# Script
Problem
After updating Unity Hub and loading any project with C# scripts in it, I noticed that there were blank compiler errors that wouldn't go away, preventing the project from running or any of its scripts from being properly included.
Here's a screenshot of the project right after adding the script:
Steps To Reproduce
Open new Empty 3D Project
Add new C# script
That's it. A blank error will now appear in the console log and will not go away until you delete the C# Script.
Investigation/Error Output
Double clicking on the blank Console Error does nothing.
I took a look at the Editor Log file (in the upper right tab of the Console -> Open Editor Log) and found the following error at the bottom of Editor.log:
-----CompilerOutput:-stdout--exitcode: 9009--compilationhadfailure: True--outfile: Temp/Assembly-CSharp.dll
-----CompilerOutput:-stderr----------
'"C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts\..\..\Tools\Roslyn\csc"' is not recognized as an internal or external command,
operable program or batch file.
-----EndCompilerOutput---------------
- Finished compile Library/ScriptAssemblies/Assembly-CSharp.dll
View the full contents of Editor.log Here
I ran the program that the error supposedly said was not recognized ("C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts\..\..\Tools\Roslyn\csc") in a Windows Command prompt, and it seems like this command IS in fact valid:
Attempts to Fix
I tried uninstalling Unity and Visual Studio, removing all files I could find in the system that referenced Unity (I may have missed a few since Unity Hub somehow automatically logged me in after I reinstalled it), and rebooting my PC.
I also tried an older version of Unity, making a new project Unity Version 2019.2.13f1, a version that has worked on my PC before, but the same exact problem occured.
None of these attempts worked.
Unity Versions and OS
OS: Windows 10
Unity Version: 2019.2.14f1
Unity Hub Version: 2.2.0
Did you take a look at this question?
https://answers.unity.com/questions/1584147/every-time-i-start-a-new-project-appears-4-errors.html
Yeah tried that, didn't work. Switching runtime version/API Comparability Level had no impact. Thanks for forwarding that though!
I fixed it! Albeit in a non conventional way. Not sure why this worked, but I think this fix can be applied to other problems found when getting blank errors.
Here's exactly what I did:
(You should probably close the Unity Editor before doing this)
Go to "C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts"
Edit "unity_csc.bat"
Replace the line that says "%APPLICATION_CONTENTS%\Tools\Roslyn\csc" /shared % with the following: "C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\Roslyn\csc.exe" /shared %
Reopen the same project in Unity and it should work.
I think if you just add an ".exe" to the end of the csc directory it should also work, but I also converted it into a full path anyways.
No clue why it worked, since you should be able to run executable commands without the ".exe" extension but I don't know much about Batch so maybe the bat file itself has something to do with it.
Can you paste your entire unity_csc.bat file? I am unable to fix it but at least now i see something ins$$anonymous$$d of a blank error Pls send a full empty project since my PC wont compile any version of Unity i use. and show blank errors in all unity versions..not even sure why.
Got the exactly same error that you, dunno how to fix it.
I got the exact same error when I wrote the path myself. I was able to fix just by using the default path, but adding the '.exe' extension. Just like @Sys_guru pointed out in a comment below.
"%APPLICATION_CONTENTS%\Tools\Roslyn\csc.exe" /shared %*
Thanks a lot for the solution, @adrisj7! I was going mad trying to understand what was going on. I tried reinstalling Unity and reinstalling Rider, but never thought to check Unity Hub!
Update to the accepted answer: Fix: Go to C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts folder Open the batch file in notepad and paste the following:
@ECHO OFF
set APPLICATION_CONTENTS=%~dp0..\..
echo host set to %APPLICATION_CONTENTS%
"C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\Roslyn\csc.exe" /shared %*
exit /b %ERRORLEVEL%
Note the * at the end that is what was missing
[Update: the .exe was missing not the *]
I followed this edited fix and it worked. Thank you and @adrisj7 for the answer!
The question now is why this issue occurred in these projects? It happened see$$anonymous$$gly randomly on my end, and effectively broke my entire project. I am unsure of what csc even does, let alone why the path to it was broken.
I've tried ur approach for Unity 2019.17f1, but id didn't work for me. Any Idea? I couldn't find the mistake.
This doesn’t work for 2020.3.8 Any other other suggestions. I can’t find anything recent.
Thanks for sharing the solution @adrisj7, I spent ages trying to figure this out.
Just adding ".exe" does work.
"%APPLICATION_CONTENTS%\Tools\Roslyn\csc.exe" /shared %*
Note that if you have multiple Unity versions, the fix has to be applied to each one.
Happend on 2018 4.0 with Win7, solved after installing Windows7 patch KB4457144, if anyone could not find folder "RoslynScripts" (mentioned in best answer), try this.
Hi ! I changed SSD drive and I installed win10. I'm using my project with 2019.1.7f1.After a working while, 4 blank errors appeared. When i use my project with old drive, there is no blank errors! When i updated to 2019.2.21f1 errors decreased to 2 errors. I have been trying to solve this for days but couldnt get rid of this. I followed suggestions @adrisj7 but none of them work. I think the problem is about Win 10 (Microsoft Windows [Version 10.0.18363.657] ) Any suggestions?
