Can’t add script component...

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 100% made sure the names match. I never changed the names to begin with. I can not resolve this to add scripts to anything inside unity. Please help.

 

So, the script name matches exactly? And not something like PlayerManager and playerManager?
The script inherits from Monobehaviour?
And you're not seeing any compile errors in the console? (this is possibly your issue if you can't add any scripts to gameobjects)

 

You need to fix any compile errors in your code before Unity can compile any changes to code (or new scripts) that have been made. Unity has to have compiled your scripts before it will be able to add them as components of GameObjects.

What errors does your console say you have?

 

No errors in console. File name and class match. I’m trying to get my son started on creating his first game in Unity, he’s 11. I made a simple controller for his character and it’s named “PlayerMovement” class is “PlayerMovement” as well. I’ve tried renaming, restarting, recreating the controller entirely. Nothing seems to be working. This only started after the new update. I even uninstalled and reinstalled Unity. I really don’t know what else to do.

 

Can you post this PlayerMovement class here?

 

This is the new controller I just started again. I’m trying to show him how to test as he goes and what all this means. But as I try to attach it to his character I get the error. Nothing in console. Names match.

 

I’ve just never had this issue in the past and I feel like it’s something simple that I’m missing. And I know I’ll feel like an idiot when I find it, but man I’ve been at this for days now.

 

Things to try:

1. Make sure the script is not located in a folder called Editor.

2. Copy the script physically away to another part of your hard drive, DELETE the copy in the project, then make a fresh blank PlayerMovement.cs script. If you can't add that then the problem is somewhere else.

 

Are you sure you don't just have console errors disabled in the console?

 

What @Joe-Censored means is this button in the upper right corner of your console window: make sure it is ON and does not show any errors:

(Same goes for Log, LogWarning, LogError, those three buttons)

 

There’s no console errors. Though I’m leaning toward the issue being with PC, I haven’t had this problem with MAC. May be an issue with my desktop in particular, I don’t know. But I’m giving up. Thanks for the input.

 

One thing to try is export your assets as a unitypackage. Than start a new project and import the assets.

I know it sounds strange, but once we had an animation that no matter what we did was screwed up. Luckily it was a small project so I exported the scene, started a new project and suddenly there were no animation issues.

Doubt it's a "pc" issue directly.

 

I had the same issue, in my case the problem was solved by deleting directory "Library\PackageCache".

 

I had the same issue.
Problem was solved after installing required .NET SDK and runtime framework.

Unity 2019.2.15f1 requires .NET 4.7.1

Hope it helps.

 

I had the same problem. I found that some unrelated script had an error. Once fixed I could add scripts to object again.

 

sir can you tell exact location

 

In Unity where your project is located (outside of Unity!) there are the

Assets

and the

ProjectSettings

folders...

Library

is right alongside, and

PackageCache

is underneath Library.

 

If anyone still has this issue you might want to try:
Go to the "Window" menu
Then down to "Package Manager" and click
You will get a list of every package available. Change from all available to just in project to shorten the list
Next click on the "package manager UI" from the list
Finally click "remove" from the lower right corner

 

Idk what is wrong but it still doesn't work. Am i this stupid or is it just Unity? im literally trying to fix it for like 2 hours now and it is stil not working. Maybe my Visual Studio needs to be on the same disk as Unity or something but im going to stop trying....

 

This didnt work for me too(for Netcode simple example from Manual). I did this actually : i saved first wrong name of the script and opened it in vs 2019. Then i Renamed it in the editor(and again opened it in vs 2019) and it didnt work. Then i deleted C# script and created new one renamed it and then it all worked good. Basically it seems if it is renamed 2 times somehow system cannot find the file dont know why - bug probably.

So just create file rename it as u want and then open in vs 2019 and it works for me - i use latest .net, windows 10 => also both unity and projects are on the same disk etc though do not know is that related(other posters above wrote about this) - hope this helps

 

Got the same error today, but it also said something along the lines of "Can your Unity install be corrupt?" So, if you just updated your engine, the install might be corrupt. If you did not, I do not know the reason.

 

Do you also need to download MonoDevelop on your pc or is that already in Unity?

 

This seemed to work for me! Thanks!

Edit: Having the same problem. Different script, and I used the same solution. Didn't work. Feels like the error is getting smarter; every time we fins a solution it 'evolves' so that the solution doesn't work anymore.

Edit 2: Just noticed that in the inspector the script has a speech bubble (noob coding language terms here) saying 'No MonoBehavior scripts in this file, or their names do not match the file name.'

 

Ive been having the same problems. I have no idea what to do as i have just started with unity. Please help me.

I tested by just creating a c# script i named it "Test Script" and dragged it into my player as a new component. It now displays the message, "Can't add script component 'Test script' because the script class cannot be found. Make sure that there are no compile errors and that the file name and class name match." What do i do now?

 

If you named the script "Test Script" then you may have an issue because class names can't have spaces. I'd make sure your class name doesn't have a space which could also lead to compiler errors.

 

I was curious what happens when you create a script with a space as I'd never done it. So here it is. As you can see, the script is created with a space, but in the code it doesn't have the space. It then says at the top, no MonoBehaviour scripts in the file or their names do not match. No compiler errors were thrown, but as suspected, you can't add the script to a gameobject as it can't find it due to the name mismatch.

 

Ok I am pissed really. So the standard assets are fracked really, the editor folder cause problems, so I moved that away from the standard assets, then I accidentally created a script in that piece of S*** editor folder and moved it away and bam every script I have made stopped working.

I have been coding for 15 years so don't give S***e like your names don't match or you can't have spaces ok, I have been working on this project for 4 months now and my progress is fraking wasted.

I seriously want to drinik the blood of the guy responsible for this!

 

First, we understand you are upset, but being upset on the forums just to complain will not get you any help.

Second, I've been coding a lot longer than you. Unity does have a few of it's own quirks and no matter how long you've been coding, I doubt you've written perfect code every time. I sure as heck haven't.

Third, if you want help, ask for help instead of trying to attack people who could potentially help you even before you try to get help, because I seriously doubt your work is wasted.

And of course, as long as I've been coding, the best thing I ever did was start using source control. In the world of programming, there isn't such a thing as "everything always goes right". So the ability to roll back or access a previous commit is invaluable.

 

Yeah you ain't helping. How can you, I see this thing persist since version 5 in various manifestations. Hey Unity-chan Instead of tech dem...erm fmvs try making a game once in awhile, you may find why your stable versions are not so stable after all.

 

This is so unnecessary. It's 2020 (edit... 2022!)... please join us and install and use source control. Unity3D works really well with git and that combination saves my bacon almost every single day. Once you start using source control, your actual productivity goes up because you can fearlessly rip-tear-shred to try stuff and see how it goes, knowing you can always roll back. It is the ultimate peace of mind.

EDIT to add my "standard source control blurb:"

I'm sorry you've had this issue. Please consider using proper industrial-grade enterprise-qualified source control in order to guard and protect your hard-earned work.

Personally I use git (completely outside of Unity) because it is free and there are tons of tutorials out there to help you set it up as well as free places to host your repo (BitBucket, Github, Gitlab, etc.).

You can also push git repositories to other drives: thumb drives, USB drives, network drives, etc., effectively putting a complete copy of the repository there.

As far as configuring Unity to play nice with git, keep this in mind:

https://forum.unity.com/threads/prefab-links-keep-getting-dumped-on-git-pull.646600/#post-7142306

Here's how I use git in one of my games, Jetpack Kurt:

https://forum.unity.com/threads/2-steps-backwards.965048/#post-6282497

Using fine-grained source control as you work to refine your engineering:

https://forum.unity.com/threads/whe...grammer-example-in-text.1048739/#post-6783740

Share/Sharing source code between projects:

https://forum.unity.com/threads/your-techniques-to-share-code-between-projects.575959/#post-3835837

Setting up an appropriate .gitignore file for Unity3D:

https://forum.unity.com/threads/removing-il2cpp_cache-from-project.1084607/#post-6997067

Generally setting Unity up (includes above .gitignore concepts):

https://thoughtbot.com/blog/how-to-git-with-unity

It is only simple economics that you must expend as much effort into backing it up as you feel the work is worth in the first place.

"Use source control or you will be really sad sooner or later." - StarManta on the Unity3D forum boards

 

If I delete this folder, won't it also delete my packages? I'm already facing different issues with Cinemachine and Probuilder components.

 

And which framework does the newest version require, anybody know? New is to say, 2019.5.1f1

 

Felt like telling you thanks, because that's the exact solution I needed!

 

Just solved my problem, If you name your folder scripts or script change that now. mine is working after renaming it to f**kton

 

I had a similar problem. My problem was, one of my scripts was in plugins folder, and i was trying to access another script into that script which was not in Plugins folder... So moving that script out of Plugins folder solved my problem.

 

I was trying for ages to find the issue and this was it thanks!!

 

problem fixed here :

 

I've already tried that it doesn't work. I did move unity in a different hard-drive and visual studios in a same hard-drive. Now i'm having this problem too. I have copied pasted and reinstalled and uninstalled. Right now I am uninstalling everything and moving it to the original hard-drive I was using. I'm going to see if that solves my problem. What good is unity when you can't make any simple scripts work?

 

I've gone through this whole thread looking for help on this problem, I'm just about to give up!! This is torture! Lol

 

I don't know if anybody else is having this problem, but after looking around online some more, someone suggested uninstalling from the package manager, "Rider Editor", I deleted it and it automatically fixed all compiler errors, all scripts are working without any adjustments to naming in the code!! I hope this helps, cause it sure as hell gave me a big relief!!

 

Hello I have the same issue. I've tried all the suggestions but it still wont work

 

No disrespect to anyone above, but the original issue is regarding a new script not being attached as a component. This likely is caused by an outdated editor.

If you have this issue, and nothing above resolves it for you, please try the following:

• Navigate in the Unity Menu to "Window"
• Select "Package Manager"
• Make sure "In Project" is selected under "Packages"
• In the "Unity Technologies section, look to see if all items listed there are up to date. You can tell if something is up to date because it will have a green checkmark.
  
• If something is not up to date, it will have a circle with an up-facing arrow to the right of it. Click this, then install the update.
  
• After waiting a few moments, navigate back to your script folder and delete the script that was causing the issue. (If you have data here you need, instead open it, copy and paste it into a new script)
• Afterward select the Object/item/etc you wish to add the script to and drag the script to it. Or access the inspector and add as a component.
  
• If the problem persists, make sure you have the latest version of unity installed.

 

I had this issue with a band new, empty script. I created in the Project window then got the 'cannot find class' window when I tried adding it to a gameobject. In my case since there was nothing in the script yet I simply deleted it and made a new one. The new one worked, go figure.

 

For me, it was caused by an error in another file. Weird.

 

[QUOTE = "ahmedaniss, publicación: 6256661, miembro: 3696869"] problema resuelto aquí: [MEDIA = youtube] dx35_RNnJEQ [/ MEDIA] [/ QUOTE]

funciono gracias !!!

 

Thanks, this worked !!

 

Hi everyone!

Seems like Unity does not like it when you rename the file (and or class) while it is referenced in other files.
I followed the 'Ruby's Adventure: 2D Beginner' course and decided to rename my 'Controller' to 'RubyController' mid way through the course and got the exact same error.

No deletion, updating or anything helped.
What DID help:
Walk through every file with your socks off and find each and any reference to my old 'Controller' and replace it with 'RubyController'. Hey presto! Suddenly Unity decided to like my scripts again and happily run along.

I hope that helps somebody!

Wild greetings,
Madweasel

 

Or, if you use the VS rename feature, you can rename all the values at once if they are properly referenced.

 

Well said. If I were a sane person I would do that.

 

This worked for me.