MonoDevelop not starting even though all assemblies installed, still not answered!
It started when I updated Unity to 5.4.3. When I try to open a script or open Mono from shortcut or even from the EXE, it says MonoDevelop-Unity failed to start. Some of the assemblies required to run MonoDevelop-Unity (for example, GTK#) may not be installed correctly. Download page, blah blah blah. I redownloaded GTK# and .NET SEVERAL TIMES and it still didn't work, same error message. Anyone have this problem or know what's going on? Please help!
-EDIT- Could it be because it's trying to draw assets from Unity 5.3.5 even though I updated Unity? If so, how do I fix this?
-EDIT 2- Here is an image:
-EDIT 3- I'm running Unity and Mono off a USB. Don't think that has anything to do with it, but just in case...
-EDIT 4- It's a problem with .NET. The installer for .NET says it's already installed, but I checked and it's not.
Apparently nobody thinks this is worth answering, but would you want to make all your scripts via notepad?
Answer by TBruce · Nov 30, 2016 at 02:51 AM
Try the following
- First of install the latest version of .net from the official Microsoft website. Then install it and rerun Unity. 
- If you are still having problems then download GTK# for .net from here. 
The .NET installer says .NET is already installed and it won't install
Have you tried item #2, download and install GT$$anonymous$$# for .net yet?
I know this will sound like a reiteration of everything that you have done over and over, but try this
- Remove/uninstall everything (Unity, $$anonymous$$onoDevelop, GT$$anonymous$$#) from you USB. 
- Remove the USB, wait, reconnect the USB. 
- Download the Unity installer. 
- Now, install Unity to the USB, make sure that $$anonymous$$onoDevelop is selected from the Unity installer and then install it. Don't install GT$$anonymous$$# or any other software. When using Unity, $$anonymous$$onoDevelop must be installed from Unity and not from any other website. The reason for this is because they are using a customized version of $$anonymous$$onoDevelop. 
Can you give me some details on your system and what you are attempting? So far I can only gather that you want to install Unity on a USB. I personally have never done this but I do have several versions of Unity on my HD. Can you give me any more specifics (Unity version, Windows version, do you have Unity installed on your HD, etc)?
I personally have installed every .NET version on my computer except the one that was installed with the OS (Windows 7 64).
I'm running Unity 5.4.2 32bit on a 64bit Windows 10 laptop, 36GB HD, not much RA$$anonymous$$. I have Unity 32bit so I can use Unity at school as well as at home.
- You have Unity 5.4.2 32bit installed on a 64bit Windows 10 laptop - does this installed version function properly? 
- You are trying to install Unity 32bit (any version) on a USB from your Windows 10 laptop - so far unsuccessful. 
There may be a lot of conflicts here. Do you have access to a clean (preferably 32 bit) machine and maybe even Windows 7? I would suggest trying to install on the USB in a different/clean environment. Also make sure that you have enough space on the USB (20GB+ - should be more than enough).
It's not unity or $$anonymous$$ono itself that's the problem at this point, it's more a windows issue, so I think I'll move this to the $$anonymous$$icrosoft site.
I ran into this very issue and updating the GT$$anonymous$$# did get me as far as $$anonymous$$onoDevelop opening again, but whenever I open scripts in Unity with Visual Studio as my default editor, it opens up both that program and $$anonymous$$onoDevelop but it won't let me edit the file in Visual Studio. When I try to open the script file there, it shows an error window saying "Unrecognized Guid format".
Answer by kaliam · Nov 26, 2016 at 09:09 PM
Can you show us the script you're trying to use?
Not a script that's the problem. When I tried to open it from the EXE or shortcut it still did it.
Unless my script broke $$anonymous$$ono, which I doubt, since that's impossible.
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