Can't add script to object in Unity 2018.1.0b8.

It says:
Can't add script behaviour VisualContainerAsset. The script needs to derive from MonoBehaviour!

Also in console:
Assertion failed: Reentered BeginCurrentContext
UnityEngine.GUIUtilityProcessEvent(Int32, IntPtr)

This is beginning of my script:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.UI;
5.  
6. public class AddButton : MonoBehaviour {

 

i've this problem too if you have a solution pls help me

 

I use unity-editor-2017.2.1f1 now and had such problem there, but after I reopened the editor the problem seems disappeared.

 

I'm using Unity 2018.1.0f2 Personal, and I'm also getting this error using :

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3.  
4.     public class HUDController : MonoBehaviour
5.     {

I'm not getting the Assertion failed message however. Anyone with knowledge on this, please share with us! I would be eternally grateful, as I have deadlines. Updates keep causing us to have backtracks.

 

I had this issue. Last time I updated .b8 I think. What had happened unity or linux make I my scripts lower case, so for example I had hudcontroller.cs but still the class was HUDController.
It was an absolute pain but I had to rename by hand.


Another I can think of is if your class name matches a unity class ( I think ) Try renaming the script with to say HUDControllerTest and do the same for class

 

I have just installed Unity 2018.1.1f1 and get the same ... script must derive from MonoBehaviour message when trying to attach this script to a gameobject:

using UnityEngine;
using System.Collections;

public class Text1 : MonoBehaviour {

// Use this for initialization
void Start () {
Debug.Log ("Start");

}

// Update is called once per frame
void Update () {

}
}

I thought it might have to do with my Visual Studio editing environment, but checking Edit > Preferences > External Tools and having installed WinMerge. Another thing I should point out is that the above test program won't complile in VS even though it's so simple nothing can be wrong with it. Or am I mistaken? Can someone help point me in the right direction so I don't waste any more time trying to figure out what must be a tiny problem?

 

Ever since upgrading to Unity 2018.1, I have had these problems too. I have tried endlessly referencing and adding extra game objects for GUI Text, watched the tutorials and I keep getting this Error. I frequently get ' must derive from mono behaviour ' issue on 90% of created scripts in the Unity Editor and am thinking of going back to 2017. Can anyone help PLEASE.

 

I have the same problem, when taking a script from tutorial assets too.

 

Did you try to report a bug?
I searched issues and the only thing I found is:
https://issuetracker.unity3d.com/is...essage-when-trying-to-add-a-script-from-a-dll

But it's old in 5.x Unity times, looks like.
Maybe it's worth to create a new bug with some code where issue is visible?