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Unity – The referenced script on this Behaviour is missing (MonoScript) [SOLVED].

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Unity - The referenced script on this Behaviour is missing (MonoScript) [SOLVED].
mr.alisherlock
mr.alisherlock

I’ve been working on a Unity project, and for some reason, every time I try to run it, I get an error message saying “The referenced script on this Behaviour (Game Object) is missing!” I don’t understand what’s going on – I’ve checked my code and all of my script references seem correct. I’ve looked through Unity’s documentation and searched online for answers, but nothing has helped so far.
Here is the code of one of the scripts, called PlayerController.cs, that is attached to a player GameObject in my game:

public class PlayerController : MonoBehaviour
{
public float speed = 10.0f;
private Rigidbody rb;
void Start ()
{
rb = GetComponent();
}
void FixedUpdate ()
{
float moveHorizontal = Input.GetAxis("Horizontal");
float moveVertical = Input.GetAxis("Vertical");
Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
rb.AddForce(movement * speed);
}
}

This script is responsible for controlling the player’s movement. It seems to be a straightforward script, but clearly something is going wrong. Can anyone help me figure out why I’m getting this error message? I’m not sure where to look next. Any suggestions or guidance would be greatly appreciated. Thank you in advance!

behaviorc#errorreferenced scriptscript missingunity
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  1. Best Answer
    abpubs Begginer
    2018-09-12T22:09:21+00:00Added an answer about 5 years ago

    Hello! So sorry to hear that you’re having issues with your script in Unity. I have actually encountered this issue before, and it can be frustrating to deal with. Thankfully, there are a few things you can check to try and resolve this error.
    Firstly, make sure that the script you’re referencing in your game object’s Behaviour tab is actually present in your Unity project. Check to see if the name of the script matches the name you’re trying to reference – it may be that you made a typo or the script was renamed.
    If the script is present and the name matches, then it may be an issue with the script itself. Double check to see if there are any syntax errors in the script – sometimes a small typo can cause the entire script to fail. Make sure that all variables are properly declared and initialized, and that any functions or methods are properly defined.
    If the script still isn’t working, try removing and re-adding the script to the game object. It may be that there was an issue with how the script was initially assigned to the object, and re-adding it could potentially fix the issue.
    Lastly, try building the game and see if the error persists. It could be that the issue is only present in the Unity editor, and building the game could potentially resolve the issue.
    Hopefully one of these solutions works for you and resolves the error with the referenced script being unknown. Let me know if you have any further questions or issues!

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  2. rahmani__abdou Begginer
    2018-09-24T23:30:55+00:00Added an answer about 4 years ago

    One possible reason for getting the error message “The referenced script on this Behaviour is missing” could be that the script was deleted or moved from its original location without updating the reference. To solve this, you can try re-importing or re-attaching the missing script to the object that is causing the error. Another possible reason could be that the script contains errors or is not attached to any game object in the scene, causing it to not be recognized by the engine. In this case, you may need to review the code to fix any errors or make sure the script is properly attached to the object.
    It is important to always double-check the names and references of scripts, components, and game objects to avoid errors like this. It can be helpful to organize your scripts and assets into folders and use descriptive names to keep track of everything. As a programmer, it’s also good practice to regularly review and clean up your code and project files to minimize errors and improve performance.

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  3. ted203 Pundit
    2018-09-30T14:04:54+00:00Added an answer about 4 years ago

    One possible solution to the problem of receiving the error message “The referenced script on this Behaviour is missing!” in Unity is to check the script that the GameObject is referring to, and see if it has been deleted or changed in any way. Sometimes, when a script is renamed or removed, the game object that was referencing it will still try to use it, resulting in an error message.

    To fix this issue, simply go to the GameObject that is giving the error message, and check the “Scripts” section of the Inspector window. Look for any scripts that have question marks next to them, as those are the ones that Unity cannot find. If you have renamed or deleted the script, simply remove it from the GameObject, and add the correct script back in.

    It’s important to keep track of your scripts and GameObjects as you make changes in your project, to avoid errors like this. Keeping a well-organized project folder and naming conventions for your scripts can also be helpful. In my own experiences, I have had similar issues with GameObjects referencing old or deleted scripts, and taking the time to double-check and re-link scripts has always resolved the issue.

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  4. austinreyes2016 Begginer
    2018-09-18T05:34:47+00:00Added an answer about 5 years ago

    Based on my experience, missing scripts in Unity can be caused by several factors. One possibility could be that the script was deleted or moved from its original location, thus resulting in the error message stating that the referenced script is unknown. This can be resolved by checking the location of the script and making sure that it is in the correct folder or directory.
    Another possibility could be that the script has errors or is not properly attached to the object or component. This can be checked by looking at the error messages in the console and addressing any issues that may be causing the script to malfunction.

    It is also worth noting that there may be compatibility issues between different versions of Unity or certain plugins or packages that the project is using. If this is the case, updating or downgrading the version of Unity or the packages being used, or finding alternative solutions to the problematic packages, may be necessary.

    In any case, troubleshooting these types of errors can be time-consuming and frustrating, but with patience and persistence, the issue can usually be resolved.

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  5. arkadashk0 Teacher
    2018-09-30T23:16:41+00:00Added an answer about 4 years ago

    One possible reason for the error “The referenced script on this Behaviour is missing!” is that the script that is referenced in the Unity Inspector is not actually attached to the game object. Double-check that the correct script is dragged and dropped onto the object that you intend to attach it to.

    Another possibility is that the script was deleted or moved from its original location, causing it to become unlinked from the game object. Check that the script is still in the exact same location that it was when you added the reference to it.

    A third possibility is that the script may have an error within it that is preventing it from being recognized by Unity. Check the console window for any error messages that may be related to the script in question.

    In my experience, this error is typically caused by one of these three possibilities. Double-checking the script attachment, script location, and console errors should help to narrow down the cause of the issue and resolve it.

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