My project won't open after I updated it to Unity (2020.1).

[Henry_R-Tist]

Any help would be much appreciated, as I’m a bit of a noob in Unity and programming in general.

1. The problem

My project won’t open after I updated it to Unity (2020.1).

After downloading the new Unity (2020.1), I tried opening my project, however, the project wouldn’t open. Unity just kept closing. Since it didn’t open, I tried downgrading back to Unity (2019.4), but that broke the entire project.

Even though I could open it, the project opened with a bunch of errors (in total, there were 16 errors), such as; “Library/PackageCache/com.unity.render-pipelines.core@8.2.0/Runtime/Utilities/CoreUtils.cs(1016,44):error CS1061: ‘SceneView.SceneViewState’ does not contain a definition for ‘imageEffectsEnabled’ and no accessible extension method ‘imageEffectsEnabled’ accepting a first argument of type ‘SceneView.SceneViewState’ could be found (are you missing a using directive or an assembly reference?)”.

Furthermore, when opening Visual Studio, I checked the references in the Assets folder and found that several references couldn’t be found. I don’t understand what happened.

2. How to reproduce the problem (if needed)

Covert from Unity (2019.4) to Unity (2020.1). (I should note that during this process, my laptop had gone to sleep because I left to eat. However, this has happened before and when I turned my laptop back on, the project was fine, along with Unity Hub and Unity.)

Then, downgrade back to Unity (2019.4).

PS: Thanks in advance for any help!

[Olmi]

Hi,

I know this will not help you in your current situation, but from now on, when you are upgrading to new Unity version and want to update your project to use it, always take a backup before you do anything. And remember, version control does not equal to backup.

If you don’t have much code or assets in your project, you could just copy the essential parts (code, graphics, audio etc. assets) to a new project and then reconstruct it that way. Of course you might need to redo many things (like assignments made in Inspector etc.)

[Henry_R-Tist]

@Olmi

Hi,

I know this will not help you in your current situation, but from now on, when you are upgrading to new Unity version and want to update your project to use it, always take a backup before you do anything. And remember, version control does not equal to backup.

If you don’t have much code or assets in your project, you could just copy the essential parts (code, graphics, audio etc. assets) to a new project and then reconstruct it that way. Of course you might need to redo many things (like assignments made in Inspector etc.)

Hey!

Thanks for the help. I was able to successfully copy the important parts of my project and get all the files I needed. My project is now running smoothly just as it did before.

I’ll now remember to make a backup before upgrading! Your help was much appreciated. Thanks again!