# Error

> Contains information about errors that occur during Package Manager operations, including the error message and error code.

## Definition

* **Type:** Class
* **Namespace:** [UnityEditor.PackageManager](/engine/6000.6/script-reference/unityeditor/packagemanager.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public class Error
```

## Remarks

Common error codes include:

* NotFound: The requested package was not found.
* InvalidParameter: An invalid parameter was provided.
* Conflict: A conflict occurred during the operation.
* Unknown: An unspecified error occurred.

```csharp
using System;
using UnityEngine;
using UnityEditor.PackageManager;
using UnityEditor.PackageManager.Requests;

[ExecuteInEditMode]
public class PackageManagerErrorExample : MonoBehaviour
{
    AddRequest m_AddRequest;
    const string k_InvalidPackageName = "this is not a proper package name";

    void Start()
    {
        Debug.Log("Create error condition during Package Manager request...");
        m_AddRequest = Client.Add(k_InvalidPackageName);
    }

    void Update()
    {
        if (m_AddRequest != null && m_AddRequest.IsCompleted)
        {
            if (m_AddRequest.Status == StatusCode.Failure)
            {
                HandleError(m_AddRequest.Error);
            }
            else
            {
                Debug.Log($"Successfully installed {k_InvalidPackageName}");
            }

            m_AddRequest = null;
        }
    }

    void HandleError(Error error)
    {
        switch (error.errorCode)
        {
            case ErrorCode.NotFound:
                Debug.LogError($"Package not found: {error.message}");
                break;

            case ErrorCode.InvalidParameter:
                Debug.LogError($"Invalid parameter: {error.message}");
                break;

            case ErrorCode.Conflict:
                Debug.LogError($"Package conflict: {error.message}");
                break;

            default:
                Debug.LogError($"Package operation failed: {error.message}");
                break;
        }
    }
}
```

**Related information**

* [Client](/engine/6000.6/script-reference/unityeditor/packagemanager/client.md)
* [StatusCode](/engine/6000.6/script-reference/unityeditor/packagemanager/statuscode.md)
* [Request](/engine/6000.6/script-reference/unityeditor/packagemanager/requests/request.md)

## Properties

| Property                                                                                   | Description                   |
| ------------------------------------------------------------------------------------------ | ----------------------------- |
| [errorCode](/engine/6000.6/script-reference/unityeditor/packagemanager/error/errorcode.md) | Numerical error code.         |
| [message](/engine/6000.6/script-reference/unityeditor/packagemanager/error/message.md)     | Error message or description. |