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Problem :

I am very new to unity. Recently I had updated my unity from the earlier unity5 to the current 2018.2.2f1. And after that update my Unity scripts are not at all loading. I had also tried to play my Scene but my scripts are not at all loading and I am unable to add my script again it shows me below error:

Can't add script component 'CubeScript' because the script class cannot be found. Make sure that there are no compile errors and that the file name and class name match.

I have already wasted a lot of my time on fixing above error but still unable to fix it so looking for the expert help who can help me in fixing my issue in less time.

8 5 2
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3 Answers

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Solution :

I also had the same problem which you have mentioned above and below is my method to fixed it :

Firstly you need to click on your Console then you will see the blank error. It is the Editor bug, and you can still see your Editor Log by selecting your console's window dropdown and after that you need to select the Open Editor Log. My problem was that the "Tools\Roslyn\csc" was missing it is very important as it is the something that Unity will always use to compile your C# files. So to fix it I simply opened the below one:

C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts\unity_csc.bat 

And after that I added the ".exe" to below line 

"%APPLICATION_CONTENTS%\Tools\Roslyn\csc" /shared %*

Above line must now be : 

"%APPLICATION_CONTENTS%\Tools\Roslyn\csc.exe" /shared %*

Now it works perfectly after making above changes.

8 4
5,680 points
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1 vote


Here are the few possible reasons you may get this error

1.Script name does not match class name

If script name is called MyClass, the class name must be MyClass. This is also case-sensitive. Double check to make sure that this is not the issue. To make sure that's not the issue, copy the class name and paste it as the script name to make sure that this is not the issue.

Note that if you have have multiple classes in one script, the class name that should match with the script name is the class that derives from MonoBehaviour.

2.There is an error in your script

Since this is an upgrade, there is a chance you're using an API that is now deprecated and removed. Open your script with Visual Studio and see if there is an error there then fix it. There is usually a red line under a code that indicates there is an error.

3.Bad import with the Unity importer and its automatic upgrade script.

Things to try:

A.The first thing to do is restart the Unity Editor.

B.Right click on the Project Tab then click "Reimport All"

C.If there is still issue, the only left is deleting the problematic script and creating a new one. There is an easier way to do this if the script is attached to many GameObjects in your scene.

  1. Open the script, copy its content into notepad.

  2. From the Editor and on the Project tab right click on the script "CubeScript", select "Find References In Scene".

  3. Unity will now only show all the GameObjects that has this script attached to them. Delete the old script. Create a new one then copy the content from the notepad to this new script. Now, you can just drag the new script to all the filtered GameObject in the scene. Do this for every script effected. This is a manual work but should fix your issues when completed.

The problem was that "Tools\Roslyn\csc" could not be found, something that Unity uses to compile C# files.

I opened C:\Program Files\Unity\Hub\Editor\2019.2.14f1\Editor\Data\Tools\RoslynScripts\unity_csc.bat and I added ".exe" to the line "%APPLICATION_CONTENTS%\Tools\Roslyn\csc" /shared %*
This line should now be : "%APPLICATION_CONTENTS%\Tools\Roslyn\csc.exe" /shared %*

Now, it should worked perfectly.

10 6 4
31,120 points
1 vote
problem fixed here : https://youtu.be/dx35_RNnJEQ
0 points
Thanks a lot for the link it really helped.

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