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Answers for "NullReferenceException: Object reference not set to an instance of an object"

C#
2

null reference exception object reference not set to an instance of an object unity

/**
To fix this, we can acquire a reference to an instance of the script using GameObject.
Find to find the object it is attached to. 
We then use GetComponent to find the script component we want a reference to.
**/

public calss MyScript : MonoBehaviour
{
	MySecondScript secondScript;
    void Start()
    {
    	secondScript = GameObject.Find("Second Script Object").GetComponent<MySecondScript>();
        
        Debug.Log(secondScript.firstName)
    }
}
Posted by: Guest on May-07-2021
10

object reference not set to an instance of an object in c#

You need to initialize the list first:

protected List<string> list = new List<string>();
Posted by: Guest on March-20-2021
1

NullReferenceException: Object reference not set to an instance of an object

// NullReferenceException: Object reference not set to an instance of an object
// Results in Error: 
GameObject.Find("Object").SetActive(true);

// Fix:
public GameObject Object; // You need to drag object onto this box in the inspector

void Start()
{
	Object.SetActive(true);
}
Posted by: Guest on September-12-2021
0

System.NullReferenceException: 'Object variable or With block variable not set.'

Dim x As String
Posted by: Guest on July-18-2020
0

onetimesetup: system.nullreferenceexception : object reference not set to an instance of an object.

Start NUnit, but don't run the tests. In visual studio make sure you have the project that contains your nunit tests open. Then in visual studio press ctrl+alt+p. This will bring up the list of processes to attach to. Choose the nunit-agent.exe process. If there is more than one nunit-agent.exe process you can ctrl+ to choose all of them. You may have to check the Show processes in all sessions and/or Show processes from all users to get the nunit-agent.exe to show up. At this point you should be able to debug your test.

Now you can set a breakpoint at the constructor call to CardTable. As you step through the debugger you should be able to identify your null object reference error.

An alternative to stepping through the code is to choose in the menu Debug->Exceptions... in the dialog that shows check the thrown box next to Common Language Runtime Exceptions. This will cause the debugger to stop on any execptions handled or unhandled when they are thrown. This removes the need for the breakpoint, but if you have exceptions being thrown that are caught, it may be more hassle than the breakpoint method above.
Posted by: Guest on July-30-2021

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