Unity 5 beta 16 will not open my project

Not sure what info to post here to help, but beta 16 will not open my project at all. The start up window opens, I choose a project, and it just closes with no error messages or anything.

Upon startup, I can create a new project and the editor opens fine, but as soon as I load the project I've been working on in beta 14 it just closes.

 

I would create a new project and start bringing things into it. Something might be bugged causing it to crash. Just an idea

 

I have the same problem. When I try to open a project that exists, Unity Beta 16 disappears from Task Manager. So I starts it again and it goes to the previous opened project. From Menu in the opened Unity, I choose to open a project I want and it opens. In other words, I try to open the same project two times - first time, Unity crashes, so I try again and the project is opened.

Yes, there's something wrong with Unity Beta 16. Try to open the project more than one time.

 

I don't think it's a bug, you just have to re-compile your plugins. the name of an attribute has changed and it's causing Unity to crash if you have plugins using that attribute, re-compiling your project for the b16 UnityEngine.dll & UnityEditor.dll fixed the problem for me.

 

I have no plugins. The project was recompiled, because before recompiling I coudn't even start Unity.

 

As I much as I appreciate the suggestions, I don't understand how I can follow any of them if the project won't open in 16.

About all I can do is just stick with 14 and hope Unity will fix it in 17 or 18.

 

I had the same problem with beta 17 and fixed it by deleting the following folders:

[Project root] / Library / ScriptAssemblies

and

[Project root] / Library / UnityAssemblies

Then the project openeded and the folders were generated again.

 

Between each beta I nuke the Library sub-folder completely as well as emptying the GICache. Sure this means that content will need to be re-imported into the new version of Unity, but given the expected churn between beta releases it seems like the most prudent approach.

 

Thanks. I'll give that a try when I get time.

 

You should make a backup of Library first of course just in case, but to the best of my knowledge it contains recreatable content.

 

Thanks a ton, guys. That fixed it.