MonoDevelop broken after updating to Unity 3.5

Questions & Answers
1

Today I updated Unity to 3.5 and no MonoDevelop refuses to load and run properly. In Unity, preferences I set the Exteranl Script Editor to Unity and press Sync MonoDevelop projects… Instead of Mono working, it throws errors: Please help.

The following add-ins could not be started:

  • MonoDeveloper.Moonlight,2.

  • MonoDeveloper.Moonlight,2.

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

  • MonoDeveloper.VersionControl,2

    • Full Path: MonoDevelop.VersionControl,2.4
    • Error: Add-in could not be loaded: The required addin ‘MonoDevelop.SourceEditor2,2.4’ is disabled.
    • Exception: Mono.Addins.MissingDependencyException: The required addin ‘MonoDevelop.SourceEditor2,2.4’ is disabled
      • at Mono.Addins.AddinEngine.ResolveLoadDependencies( ArrayList addins, Stack depCheck, String id, Boolean optional)
      • at Mono.Addins.AddinEngine.ResolveLoadDependencies( ArrayList addins, Stack depCheck, String id, Boolean optional)
      • at Mono.Addins.AddinEngine.LoadAddin( IProgressStatus statusMonitor, String id, Boolean throwExceptions )
      • at MonoDevelop.Ide.ImageService.LoadStockIcon(StockIconCodon iconCodon) in C:\BuildAgent
        work
        f35c19242f914808\monodevelop\main\src\core\MonoDevelop.Ide\ImageService. LN 89"
2

Uninstall/Reinstall or just reinstall will probably be the fastest and easiest solution, if something went corrupt it might even be the only one.

Or you could switch to another editor.

3

Unless there’s a very important reason that you can’t, it’ll probably be less effort to just uninstall and reinstall from scratch.

4

I got this working. I deleted the Welcome and VersionControl files (Addins causing startup error) from the Addin folder and it started working fine. I don’t use VersionControl with Mono and Welcome stores your recently opened files (I think). Both features which aren’t important to me for what I’m doing.

Just to be sure though I reinstalled Unity and it’s still working fine now.

My guess is maybe some hidden files were left behind when I first uninstalled Unity and they were conflicting with the new version, but I could off.,I got this working. I deleted the Welcome and VersionControl files from the Addin folder and it started working fine. I don’t use VersionControl with Mono and Welcome stores your recently opened files (I think). Both features which aren’t important to me for what I’m doing.

Just to be sure though I reinstalled Unity and it’s still working fine now.

My guess is maybe some hidden files were left behind when I first uninstalled Unity and they were conflicting with the new version.