Hey,
fast in short. I have 2017.1.1f1 personal version Unity. And what’s up with Unity it can’t open project? I’ve been working for like 8 hours and if I want to re-open to check something or etc. it won’t open. Does this happening only to me or I’m missing something?
One thing found helped me is go to Task Manager and End Process Tree on Unity, but I shouldn’t go there every time it does “this thing”.
Any help is appreciated.
@iKazanova -
Just experienced this issue and tried this solution on two different projects and it resolved both issues:
Under your project check the Temp folder for UnityLockFile. Delete it and try to open the project again. Click OK on the popup that you get on opening.
It looks like Temp should not exist if Unity was properly shut down so you may be able to remove the entire folder.
UPDATE:
Steps taken:
Other Options:
I have also seen a lot of posts that state opening from an open project resolves the issue. If you can find a project that opens, open it and then open the locked project.
If none of these options work then you can also send a report to Unity support. You have to include the affected project and it takes a while to send but may be worth it for a solution from Unity.
If you have any controllers plugged in try to disconnect them. Worked for me
I don’t normally have any knowledge to help people, but I just thought I’d add in that had similar issue as @eovento, I’ve been using unity with no problems at all for a year or so - last month I got SurfShark VPN and everything stayed as normal. This week however Unity just wouldn’t load, no crash report, just failed to get past the unity splash screen - did the usual of uninstalling Unity, upgrading to Unity 2020, still no luck - disabled my VPN and bingo, Unity works again.
Why the two don’t get along I don’t know, but thanks to @eovento for the info.
Having this issue after Unity crashed while importing an asset.
I can open other projects, but not this one.
Unity process disappears without any report right after clicking to open my project.
If I delete the temp folder or the UnityLockFile, Unity creates them, then crashes directly without any report.
Opening it after opening another project doesn’t change anything.
I have the same problem as Xialya do. Sended crash report.
UPDATE
git clean -fxd helped me (this command deletes all files that not present in git repo)
CAREFULL some editor settings can be lost
.gitignore
/[Ll]ibrary/
/
emp/
/[Oo]bj/
/[Bb]uild/
/[Bb]uilds/
/Assets/AssetStoreTools*
# Visual Studio 2015 cache directory
/.vs/
# Jetbrains IDE cache directory
/.idea/
# Autogenerated VS/MD/Consulo solution and project files
ExportedObj/
.consulo/
*.DS_Store
*.csproj
*.unityproj
*.sln
*.suo
*.tmp
*.user
*.userprefs
*.pidb
*.booproj
*.svd
*.pdb
# Unity3D generated meta files
*.pidb.meta
# Unity3D Generated File On Crash Reports
sysinfo.txt
# Builds
*.apk
*.unitypackage
# Save data
/Assets/Save/
/Assets/Save.meta
I have a solution for this problem
sorry for reviving a dead thingy here but
check that the hard drive/folder that you keep projects in is not read only
anyone read this post may solve this problem.I got the same issue when i upgrade my unity hub, just reinstall the Unity editor so you can fixed it. I noticed there is a little change with the version number,which the old one is 2019 4.37 but the new one is 4.38,and 4.37 was gone in editor list, i think that is the matter.When i reinstall the 2019v but the new one, all the issues were gone.(contain ‘can’t open the project file’)
Not sure if this problem should be posted here or not but, I’m using 2021.3.16, and I can’t even create a new project. The timer icon just keeps spinning, I’ve trying to create a new project for over an hour. I have checked the logs and I do have an error message “Authentication service” “access token expired” I’m online, signed in, and no idea how to solve this. Any help would be great, Thank you
I also cannot open projects that previously worked.
I have been experiencing the exact same problem in the past few days, and I have to End Process the Unity.exe in the Task Manager every time! I thought it was because of my version: Unity 5.6.1f1
I’ll keep watching this thread for answers!
I have the same problem. I was able to ope projects by deleting all the folders and files except Assets and Project Settings. Unfortunately this method doesn’t work for me anymore. So I uninstalled Unity and then reinstalled it. It worked once and then failed again. Now I not only can’t Open Project, I can’t even create New Project. What is happening? Can anyone help, please?
Yep, here to add another case :
So what’s going on, please ? @ Unity support ?
I have same problem Help plss!,I have got same problem. help plssss!
I have been troubleshooting this extensively. Nothing seems to help. It really is intermittent so it appears that deleting folders and files works, but it doesn’t open the next time and there seems to be no way to get out of it once you try one time. I have to unplug my computer (somehow it interrupts even the shutdown process)
Having a similar problem, I tried opening my Unity 2018.2.5 project with this same version, didn’t work, and I then tried with 2018.2.7, didn’t work neither, and deleting the UnityLockfile doesn’t change anything 
I got this problem after Unity crashed for unknown reasons, and I always have to end the process in the task manager
Same problem here.
Im new in unity so spend last 8 hrs with learning.
Day after I try to open a existing project to continue the same issue.Unity is already in list. You cannot locate the same version.(must click a 20x times to read that flash message appear under HUB)
Im using a Unity personal version 2019.3.0f1, so every time I start the Unity HUb warning that I dont have a active licence.
Try every time with manual activation. But problem not solved. Unity is already in list…
So I found the solution. Its work for me maybe it will be helpful for some of you.
It would normally sound strange, but nothing sounds strange in this thread anymore: are you guys using VPN?
To me it started exactly at the same day I started using VPN. At first, logic was not allowing me to correlate events, but after reading here about rebooting, turning connecting down, running Unity and then restoring connection I started to connect the dots.
Changing the server have an influence on the matter for me.
About the case, I just had this for the first time after working on a project for 8 months now.
Unity would always recreate Temp folder and UnityLockfile. Not only in one, but inside all the projects I tried opening.
And it also started happening a day after my computer crashed while working on the project. So there are these two events: Unity crashing and VPN.
So if somebody else ends up here:
For me it was a way too complicated OnDrawGizmo() Method i wrote in a Script.
The editor tried to draw the gizmo at start, took too many ressources so it crashed.
I commented the method out and it worked again. I also removed the import settings for the script, but im not sure thats a necessary step.
I got the same issue when my computer crashed while running Unity in Play Mode.
Deleting the Temp folder didn’t work for me, rather deleting the Library folder did the job.