I am having an issue in Unity where every time I launch the editor it asks me to enter in safe mode because there are a lot of errors and when I press ignore it launches and I can see in the console a lot of errors with the UI and I found out that I cant create UI elements directly in the hierarchy. I tried to update from 2020.3.13f1 to 2020.3.14f1 and for the first launch everything was fine, with no errors, and I could create UI elements but then when I restarted to make sure everything was actually fine, all the errors popped up again and I cant create UI. Why does this happen and does anyone have a fix because I can't find it anywhere online.
Try not to enter Safe Mode. Enter the editable project. There go to Assets-Reimport All.
It did it to me too, it's probably a Unity bug, this method fixes it. Practically it reimports the whole project by itself, avoiding that the bug gives you problems (such as those like UnityEngine.UI does not exist or Monobehavior does not exist, etc.)
Obviously you will not lose any assets and everything will be fine as before receiving the errors.
Have this issue with any template 2020+ versions
Always shows 2 empty errors on console at first run ,even on an empty project
Will try to install 2019 and hopefully work again
in my case some side app ran caused some error in the installation of Unity.
Nothing amid aboves helped.
Thus I decided to fully reinstall it from scratch to default one.
Now it worksok. But before that . To wipe out the Unity thorowly you need in:
uninstalling Unity and UnityHub in windows' settings
remove all related/remained folders in "C:\Program Files"
remove related/remained folders in "C:\Users\myname\AppData\Local "
in Register Editor go to clean unity like folders in "Computer\HKEY_CURRENT_USER\SOFTWARE"
optionally, remove sample projects in "C:\Users\myname"
You're very likely simply opening the wrong folder, it's a common mistake
Or, you have possibly moved around the folders that you cannot move
Also - it's a nuisance but it's best to install the "hub"
Yesterday I updated unity from unity5 to 2018.2.2f1. Unity scripts are not loading after Update 2018.2.2f1.
Once I try to play the Scene the scripts are not loaded and I can't add the script again it gives this 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.
If you still have the old copy of the project, upgrade the Unity project to Unity 2017 first then to 2018.2.2f1.
Here are the few possible reasons you may get this error(Ordered from very likely)
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.
A.Open the script, copy its content into notepad.
B.From the Editor and on the Project tab right click on the script "CubeScript", select "Find References In Scene".
C.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.
Here, is some reason why that's heaping.
1. Your Script Name And your class name isn't same.
2. May be there is an error in your script.
Here, is the few way to resolve it.
1. Make a same name of script and class in to this script.
2. find there is the error? and try to resolve it.
Posting here for historic purposes and if someone from Google ends up here, I strictly had the same problem (I'm on Windows 10) and here's how I fixed it :
If you click on the Console, you should see a blank error. Don't worry, it's a Editor bug, and you can see the Editor Log by selecting the console's window dropdown and selecting Open Editor Log.
For me, 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 works perfectly.
I'm completely new to Unity and game development, but I found that making the error true by entering an incorrect name, then entering the right one seems to "trick" Unity into fixing its error.
I had the same error show up but for different reasons (in case someone ends up here from google).
I was a beginner and named my file with a space in it. I got the same error after that. Make sure to NOT include spaces in your C# script.
One more thing which might help apart from other answers
Make the class which inherits from the MonoBehaviour the first class in the file. It fixed this issue for me.
Checking the console bugs and fix them is a good way to solve the problems "Can't add script component because the script class cannot be found?", although the bug seems to be irrelevant.
This works for me when I fix a bug in the other script.
for me I found out it was a script that I wasn't using which was linked to the player and other scripts that I deleted.
For me, the problem was that there was an error in another script.
Once I fixed the error, I could FINALLY attach my other scripts onto my gameobjects.
I just had this issue where I had a perfect script, no errors, and the same name as it should be but no matter what it wouldn't let me add it to a gameObject.
There was another script that was completely unrelated but it had an error in that and somehow that prevented me from adding my good new script.
Like some folks already posted here - the issue might be of a different code.
I was trying to add a script that was referenced by another one which had errors - it doesn't tell you that is the reason, although visual studio kinda suggests it by showing you the errors in the open script.
Just delete the bigger (errored) script and start adding to the unity project from the basic ones.
I had this issue where I had a good script, no errors, good name, restarting unity, following a tutorial exactly but still had this issue.
The way I fixed this is just deleting this buggy script file and creating it again. It fixed my problem perfectly! Now I could add the script to my game object with no such errors!
Hope this helps you! Cheers!
When I'm building my unity app, I noticed when I use the developer mode, I get an error called "could not produce class with id 362". When I removed a certain object with a script I created, the error goes away. I have no idea what is producing this error or how to fix it.
Below is a partial answer. First, is some useful research I found while writing it:
Under certain build configurations, either using IL2CPP or using Engine Stripping in WebGL, Unity will aggressively strip out components in order to reduce build size.
One potential error from Unity being overaggressive about it can be could not produce class with id xyz.
The WebGL plaform documentation states:
##Issues with code stripping
Code stripping might cause issues with your project if it strips code
which is actually necessary. This can be the case when you load
AssetBundles at run time which contain classes that are not included
in the main build, and have therefore been stripped from the project.
Error messages appear in your browser’s JavaScript console when this
happens (possibly followed by more errors). For example:
Could not produce class with ID XXX
. . .
If you suspect that stripping is causing problems with your build, you can also try disabling the Strip Engine Code option during testing.
From PlayerSettings.stripEngineCodedocumentation
Remove unused Engine code from your build (IL2CPP-only).
If this is enabled, unused modules and classes of the Unity Engine
codebase will be removed in IL2CPP builds. This will result in smaller
binary size. It is recommended to use this setting, however, you may
want to disable it if you suspect this causes issues with your
project. Note that byte code stripping of managed assemblies is always
enabled for the IL2CPP scripting backend.
In the WebGL platform documentation, there is this suggestion to troubleshooting the issue in general. Even though your problem is seemingly not caused by WebGL or IL2CPP stripping, this might help you:
To troubleshoot these errors, look up the ID (such as XXX in the
example above) in the Class ID Reference to see which class it is
trying to create an instance of. In such cases, you can force Unity to
include the code for that class in the build, either by adding a
reference to that class to your scripts or to your Scenes, or by
adding a link.xml file to your project.
Below is an example which makes sure that the Collider class (and
therefore the Physics module) gets preserved in a project. Add this
XML code to a file called link.xml, and put that file into your Assets
folder.
<linker>
<assembly fullname="UnityEngine">
<type fullname="UnityEngine.Collider" preserve="all"/>
</assembly>
</linker>
Ever since i open my project in unity today every script existed/Created have been given me
Error cs2001 source file "ScriptName.Cs" could not be found
I have reinstalled Unity, Tried Updating it and even created a new project. Still same outcome.
Ever time i tried attached my scripts to a object, it's have given me the error
Can't add script behaviour VisualContainerAsset",Can't Add Script "The script needs to derive from MonoBehaviour!"
Here is some pics how it's looks after i create a C# Script.
Sorry if i sound a bit confused!
UPDATE!:
Malware Bytes was the problem, it would't allow mono developed.
Could you show me one of the scripts? Maybe it misses some of the imports (using UnityEngine;) at the top. Or maybe they don't inherit from MonoBehaviour (classname: MonoBehaviour). It's strange nonetheless...
Suddenly flash builder stops identifying data members of a class. When I type obj. the intellisense window does not show any data members or methods. Yesterday I got problem with 4.6 and now with 4.0. Yesterday I imported the source files into new project to resolve this problem. I thought it is something to do with the newer version but I got this in 4.0 as well. This is really a huge problem.
I did all tries like
Reopening project
Restarting FB
Triple checking the import packages/classes
Syntax error
It is similar problem with many of people got here and I am sure it is not a problem of importing packages/classes or any syntax because It happens all the sudden randomly to random class.
Not just that but when I ctl+click on the variable (which should tame cursor to the variable declaration) IDE throws an error message "Code Navigation error: Source could not be found"
I am not pasting any code here because, as I said earlier I am sure its not related to any syntax, importing issue (in short not a coding isssue), but just some sort of FBs memeory/stack or something else.
Please let me know if any one has faced this problem and found the solution other than copying the source into a new project