Monodevelop not opening in Unity 4.3

I downloaded the new Unity3d with the 2d features, mostly because I was really excited for the new features. Monodevelop 4.01 won’t open at all. I’m not sure what to do since there are no error messages or anything. The splash pops up and immediately closes.

I’ve tried using the alternative config file floating around but nothing changes.

I’ve tried looking for log files but I can’t find any.

Solved it by downloading this file and putting it in the Unity\Monodevelop\bin folder. Don’t forget to make a backup of the original file, for the heck of it.

For OSX 10.8.5

I was able to get this to work again by going to Unity Preferences → External Tools → External Script Editor and instead of selecting the “Monodevelop (Built In)” option select “Browse” and find the “Monodevelop.app” located in the Unity folder in the Applications folder.

I’m assuming the last answer was for Windows since the path for the .dll they laid out isn’t something that’s on my computer, so that doesn’t really help me (although I did try putting that dll in Applications/Unity/MonoDevelop.app/Contents/MacOS/lib/monodevelop/bin … but there wasn’t there one already and it didn’t do anything anyway)

for OSX 10.8 Mountain Lion, Monodevelop doesn’t seem to open if the user account isn’t an admin. Changing to admin privileges fixed it for me. [Of course that’s a bug - it’s better to regularly use a non-admin account.]

This is very easy to fix. Click Ctrl+Alt+Delete, choose Task Manager, go to Processes, and choose to End MonoDevelop process

Uninstall Unity and delete the folder of monodevelop in the Unity folder before re-installing. Worked for me in Windows 8.

I figured I would put the problem I am having on here for a reference in case anyone else has the same issue. It is similar to this issue.

My problem was if I click on a file to open it or double click a line that has an error in unity it showed the splash screen for Mono Develop but the program did not actually open. The issue seems to be there is a broken task for this running in the background, go into task manager and end task on the running Mono Develop, in my case I had 2 showing but did not have one open. I closed both and it works again.

This is all after I re-installed Mono and unity which made it work again at first. After a few minutes it did it again. Every once in a while it breaks like this and I have to end the task again.

I am using windows 8 and I think it may have something to do with it.

If you have windows, click on the ‘start’ button which is on the bottom left hand corner of the desktop. Then, type in ‘monodevelop’ and it will come up. Click on that and it should work.

when it breaks for me it doesnt even apear in the task manager (i’m on windows btw) i just went into start, all programs and found monodevelop under the unity file and clicked it fromn there then it opened, it did this yesterday and pissed me off cause i thought i’d have to un install and reinstall unity AGAIN, they really need to fix this bug in the next update!

I noticed that the .dll solution still makes monodevelop crash once in a while.
What I did was go to the actual monodevelop website:
http://monodevelop.com/Download

and install one of the required packages “GTK# for .NET 2.12.25”.
This will make sure you have the proper DLL and it should run fine after that.

Now they just need to fix the damn empty Document Outline in javascript…

I had the same problem and solved it super easy. The problem seems to be that Unity won’t find Monodevelop, the reason is probably because in earlier unity versions i think the Monodevelop file (icon) was found in the Unity/ -folder, while in the latest version it is found in Unity/Monodevelop/. So in other words just move the Monodevelop file to the Unity folder, as seen in the picture above.
Then run Monodevelop.

That did work for me.

Maybe the addin database is corrupt. Try removing the caches from %LOCALAPPDATA%\xamarinStudio-5.0\Cache.

i tried it didn’t work, plus when i try to goto unity prefs to change the Monodevelop (built-in) thing to Monodevelop.app , i get this instead of the prefs:

[33295-unity+prefrences.png|33295]

open taskmanager end monodevelop task and then try again ,this solved my issue :slight_smile:

open taskmanager end monodevelop task and then try again ,this solved my issue :slight_smile:

Thank you charlesanjos it helped a lot,work for me

I solved this Problem by installing the right Net Framework version.

Another Fix:
Right click on MonoDevelop in the Finder and select 'Show Package Contents", right click on the ‘Contents’ folder and select “Get Info” down at the bottom of the info window, for ‘Everyone’ change the ‘Sharing and Permissions’ from ‘read only’ to ‘read and write’. Finally click the wheel icon at the very bottom and choose ‘Apply to enclosed Items’.