Updating to Entities 0.6 or higher removes the EventSystems from UnityEngine

After updating the Entities Package to Entities 0.6 or 0.7 i get 999+ Errors in my project almost all of them say:

The type or namespace name 'UI' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?

or

The type or namespace name 'EventSystems' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?

when i go back to Entities 0.5.1 all errors get fixed by themselves.

i dont see how this error can be related to the Entities Package.

is there a known solution ?

Thanks.

 

Did you restart Unity

 

yes, i did but nothing changes, apart that the Entities Package is ignored after Unity restarts.

 

Did you update the collections package at the same time?

For some stupid reason unity does not have collections package as part of the entities dependency but it's required (and a specific version)

 

yes i have Collections 0.6 Installed.

that's really weird.

 

If you're using entities 0.6 i'd downgrade to collections 0.5.2p8
If you're using entities 0.7 use collections 0.6.0p9

(Do it in an empty project if you're having issues)

 

creating an empty project with the latest Entities package is working like a charm, but not working with my project.
i also installed all needed packages and ported the manifest.json to my project and still the same error.

 

I would suggest deleting "Library" folder and let Unity to download & cache all the packages again. It solves most of the problems like this for me.

 

Thanks @destructor465 i tried it but still the same.

 

Maybe there is an error preventing the package manager to solve all the dependencies correctly? Like the usage of one of the expired APIs (like the World.Active). Had some issues with package manager related to compiler errors, but didn't had the time to create a repro project to report it.

 

I had the same errors. It was because I had Newtonsoft.Json in my project and UT included it with DOTS too.

 

I fixed it few hours ago by deleting the Nuget package.
( Unity Restart is required )
Thanks guys for your help!

 

I also was trying to update from 0.2 to later version 0.3+
So far I managed update to 0.3. Beyond that, all sorts of errors.
Bunches of errors.

Did you removed nuget.mono-cecil@0.1.6-preview, (or similar) from the Library folder manually?

 

No, I had Nuget installed from the assets store, I justed removed the nuget, packages, nuget config file under the Assets folder.

 

Eh, then I got something else lurking about.
I will wait I suppose. I don't think there is rush for later Entity package?
Anything particular to miss from there? I feel a bit lagging behind updates.