Unit 4.3.1f1 crashes when trying to remove trees from the terrain
Deleted the Terrain, Tried with new terrain, Didnt work
Started a new project,Same trouble.
My work’s halted all of a sudden for this issue .
I used Unity 4.3.1 to remove re-ad trees and in an old project that was upgraded but my terrain and trees had no special scripts or behaviours attached to them.
Do you have code that is attempting to access the deleted trees in some way? I see you’ve already tried creating a brand new project.
I’m sorry i didnt get you, Can you elaborate?
the error says “r605 pure virtual function error” , then crashes.
Wow, I haven’t seen such an error in a log time.
Create a new project restore Unity Editor to it’s default preferences. Uninstall Unity, see if their is an update to your video drivers upgrade if so, reboot, and reinstall Unity.
Otherwise, you shouldn’t get such an error.
Everythings updated.
Just switched to windows 8, so i installed the most recent drivers of all the stuff 
It was running super smooth, until it started poping this error “all of a sudden”.
You should run Windows 8.1 although I dislike I have to sign in with a Windows account to my computer to use SkyDrive.
Not sure what to tell you. If Unity starts and only crashes after importing your assets then you must pay attention one by one as you import each asset until you find the one causing the crash.
If Unity is crashing trying to create a new project then the only tip I can give is to make sure the new project has a different name than the old one (it matters I’ve found)…
…and if that doesn’t work it’s the usual Windows debugging routine: event viewer, simple reboot, uninstall drivers, reinstall offending program, Windows rollbacks, File System rollbacks, backups, drivers versions (many times with NVidia ATI video cards you are better off using older drivers), Windows reinstalls, and don’t say it, Windows clean install, and so on…
[quote=“goat_1, post:7, topic: 521839, username:goat_1”]
You should run Windows 8.1 although I dislike I have to sign in with a Windows account to my computer to use SkyDrive.
Not sure what to tell you. If Unity starts and only crashes after importing your assets then you must pay attention one by one as you import each asset until you find the one causing the crash.
If Unity is crashing trying to create a new project then the only tip I can give is to make sure the new project has a different name than the old one (it matters I’ve found)…
…and if that doesn’t work it’s the usual Windows debugging routine: event viewer, simple reboot, uninstall drivers, reinstall offending program, Windows rollbacks, File System rollbacks, backups, drivers versions (many times with NVidia ATI video cards you are better off using older drivers), Windows reinstalls, and don’t say it, Windows clean install, and so on…
[/quote]
I’ve attached the problem. Uninstalled and Reinstalled unity ,Same trouble. Even with new projects
alright guys i figured out something , this only happens when you try to remove the “last” tree from the terrain 
weird.
I have same problem…
I have just encountered the same issue, so it seems to have not been addressed haha. I’ve taken to just leaving that tree there, and working around it.
Yup also having the same issue. It wasn’t doing it last night but now it decides to do it. Fucking annoying if you ask me.
also got the same problem. Last tree deleted and unity (4.3.3) crashes. Send the error report. will see if this helps…maybe in one of the coming versions.
Getting the same issue with Unity4.3.0f4
At first I thought it was a tree alteration script I’d written, and was going insane trying to figure out where I went wrong.
Sort of nice to know this an issue intrinsic to Unity, rather than the world’s sneakiest logic flaw hiding in my code.
Yes this is more than annoying and need to be addressed urgently. How can you write tree management scripts like this!!!