Unity type or namespace name 'InputSystem' does not exist in the namespace 'UnityEngine'

Question

I have installed the new InputSystem package in my Unity project. I have set the input to "new inputsystem" in the Unity Player Settings. I have quit and restarted both Unity and VS Code.

But when I try to use the system in VS Code, I immediately get this error:

using UnityEngine;
using System.Collections;
using UnityEngine.InputSystem;              // <-error
using UnityEngine.InputSystem.Controls;     // <-error

The type or namespace name 'InputSystem' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?) [Assembly-CSharp]

What can I do to make VS Code recognise the Unity InputSystem package?

Answer 1

The issue is that the required .csproj files (VSCode needs them to understand the available libraries) for the new package were not auto-generated when you installed the new package (it didn't happen for me either, maybe it is intentionally manual).

Go to Edit -> Preferences... and then click on External Tools. You need to tick the box to Generate .csproj files for: Registry packages (and any other ones you might want) and then click on Regenerate project files.

That should generate whatever is needed for VSCode to recognize the new package - you shouldn't even need to restart it.

Answer 2

There's multiple reasons for this issue

I had an existing Assembly Definition that needed an Assembly Definition Reference to Unity.InputSystem

I added an Assembly Definition Reference to Unity.InputSystem in the inspector for "Scripts"

Rebuild had 0 errors.

Answer 3

You need to install the package. Go to Windows / Package Manager. Search Input system and press install confirm to restart and replace the old input system.

Answer 4

If you get errors when Unity is trying to resolve the dependencies for the new Input System.Follow these steps and it should work: Regenerating your project only works, if you have the Input System actually installed.

1. Install Input System (Windows > Package Manager)

2. Set your project to new Input System (Project Settings > Player > Input System)

3. Regenerate Project Files

Like other answers suggested, try regenerating your project files. This will only work, if the previous steps were succesful.

Answer 5

Select your Input Action Asset, and turn on Generate C# Class from the inspector window and click on apply to generate a C# script file.

Answer 6

I had the same issue (Mac 10.15.17 with Unity 2019.3.151f1 personal) but the above didn't work 100% for me. Here was my solution:

First, I ensured that I installed the InputSystem package via the package manager. Window > Package Manager. Search for it and you should be able to install 1.0.2 which is the newest as of this post.

From there, I ensured that VS code was setup correctly. I when to Unity > Preferences > External Editor and ensured that VS code was the correct editor. I then selected Regenerate project files.

Lastly, on the script I was using, I included it in the top of the file like so:

using UnityEngine;
using UnityEngine.InputSystem;

Answer 7

close the Unity and VB, remove these files from the project folder *.sln *.csproj , run unity then click Assets -> open C# project

Answer 8

Solution:
Go to Edit -> Preferences... and then click on External Tools. Remove the tick from the box for: Registry packages (and any other ones you might want) and then click on Regenerate project files.
I don't know why but it worked for me (no need to restart VS Code)
Image of the steps
Environment:
Unity version: 2020.2.7f1
VS Code version: 1.61.2
Input System Package version: 1.2.4

Answer 9

I did all the above and still had the problem. What finally, helped me was:

Changing VS Code package to 1.2.3. You can do that by going to:

Packages/Manifest.json

finding:

"com.unity.ide.vscode"

and changing version from "1.2.4" to "1.2.3"

The original solution was posted by user Cartina: https://forum.unity.com/threads/cannot-find-unityengine-inputsystem.807645/

Answer 10

I came across the same issue, and solved it. so, leaving a note here.

my case

In my case, after installing the new InputSystem package by Package Manger on Unity Editor, and then restarting Unity Editor following the appeared dialog, I could see Input System under Packages folder on Project view. However, any reference to namespece UnityEngine.InputSystem got errors.

What I found that Unity.InputSystem.dll didn't exist under [Project Dir]/Library/ScriptAssemblies/Unity.InputSystem.dll, which is what the Unity project refers to. This path can be found in Assembly-CSharp.csproj, placed right under Unity project directory.

Actually, it was not only for Input System package but also the same for all the other packages I uses. [Project Dir]/Library/ScriptAssemblies only had 2 files, Assembly-CSharp.dll and Assembly-CSharp.pdb, although this directory should hold dll files from all the installed packages.

solution

My solution was simple.

1. delete Assembly-CSharp.csproj file ( to be regenerated at some stage )
2. close Unity Editor
3. close Unity Hub
4. open Unity Hub
5. open Unity Editor

At the last step, before Unity Editor fully waked up, I could see all the package dll files are loaded to [Project Dir]/Library/ScriptAssemblies directory.

I'm not so sure whether csproj file delete and Unity Hub restart was necessary, but this is what I did, which recovered my broken project.

my environment

• Unity 2019.4.14f1
• macOS 10.15.7
• Visual Studio 8.8.4

Answer 11

In my case (Windows, Unity 2019.4 15f1, Visual Studio Code 1.53.0, Input System 1.0.2) Setting the Architecture of the project to x86_64 helped.

File-> Build Settings -> Plattform (PC, MAC & Linux Standalone)

I'm not sure though if this could even effect VS Code or if I did anything else in between to resolve this.

Answer 12

if you wanna Using Something Like inputField Or Etc. you can do it by add

using UnityEngine.UI;

Answer 13

In my case I was creating my Script in a third-party folder (Mirror). As soon as I moved it to my Scripts folder it worked.