monodevelop crashes on startup

What's the output of it when you start it in a terminal?

monodevelop
2006-09-18 21:19:16,388 [-1210468672] ERROR MonoDevelop.Core.ILoggingService [(null)] - Add-in failed to load: MonoDeveloperExtensions
2006-09-18 21:19:16,437 [-1210468672] ERROR MonoDevelop.Core.ILoggingService [(null)] - MonoDevelop.Core.AddIns.MissingDependencyException: Required add-in not found: MonoDevelop.Core v0.10.0
  at MonoDevelop.Core.AddIns.AddIn.CheckDependencies (System.Xml.XmlElement deps, Boolean rootDependencies) [0x00000]
  at MonoDevelop.Core.AddIns.AddIn.Initialize (System.String fileName) [0x00000]
  at MonoDevelop.Core.AddIns.AddInTreeSingleton.InsertAddIn (System.String addInFile) [0x00000]
no implementation for interface method MonoDevelop.Ide.Codons.IDisplayBinding::get_DisplayName() in class MonoDevelop.XmlEditor.XmlDisplayBinding
METHOD .ctor()
METHOD CanCreateContentForMimeType(string)
METHOD CreateContentForMimeType(string,System.IO.Stream)
METHOD CanCreateContentForFile(string)
METHOD CreateContentForFile(string)

** ERROR **: file class.c: line 2049 (mono_class_setup_vtable_general): should not be reached
aborting...

=================================================================
Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

Stacktrace:

  at (wrapper managed-to-native) System.Reflection.Assembly.GetTypes (bool) <0x00004>
  at (wrapper managed-to-native) System.Reflection.Assembly.GetTypes (bool) <0xffffffff>
  at System.Reflection.Assembly.GetTypes () <0x0000c>
  at MonoDevelop.Core.AddIns.DefaultAddInTree.LoadCodonsAndConditions (System.Reflection.Assembly) <0x00023>
  at MonoDevelop.Core.AddIns.DefaultAddInTree.LoadAssembly (string) <0x0008d>
  at MonoDevelop.Core.AddIns.AddIn.AddRuntimeLibraries (string,System.Xml.XmlElement) <0x00151>
  at MonoDevelop.Core.AddIns.AddIn.ReadXmlContents (string,System.Xml.XmlElement) <0x000ce>
  at MonoDevelop.Core.AddIns.AddIn.Initialize (string) <0x0022a>
  at MonoDevelop.Core.AddIns.AddInTreeSingleton.InsertAddIn (string) <0x00057>
  at MonoDevelop.Core.AddIns.AddInService.PreloadAddin (MonoDevelop.Core.IProgressMonitor,string) <0x0029e>
  at MonoDevelop.Core.AddIns.AddInService.PreloadAddins (MonoDevelop.Core.IProgressMonitor,string[]) <0x00329>
  at MonoDevelop.Ide.Gui.IdeStartup.Run (string[]) <0x00a8d>
  at MonoDevelop.Core.AddIns.AddInService.StartApplication (string,string[]) <0x0017c>
  at MonoDevelop.Startup.SharpDevelopMain.Main (string[]) <0x00039>
  at (wrapper runtime-invoke) System.Object.runtime_invoke_int_string[] (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

        /usr/bin/mono(mono_handle_native_sigsegv+0xde) [0x81565ee]
        [0xffffe440]
        /lib/tls/i686/cmov/libc.so.6(abort+0x103) [0xb7dc6ee3]
        /usr/lib/libglib-2.0.so.0(g_logv+0x4c2) [0xb7f5e1a2]
        /usr/lib/libglib-2.0.so.0(g_log+0x29) [0xb7f5e1d9]
        /usr/lib/libglib-2.0.so.0(g_assert_warning+0x76) [0xb7f5e256]
        /usr/bin/mono [0x80f1d82]
        /usr/bin/mono [0x80f244a]
        /usr/bin/mono(mono_class_init+0x62d) [0x80f2abd]
        /usr/bin/mono(mono_typ...

I do have the exact same problem (same error in the terminal).
I run edgy x86.

Other mono software (fspot, tomboy, monodoc) seem to run flawlessly.

I found out what the problem was.

Actually, the problem is that there is a major monodevelop update in edgy (-> 0.12), but the update doesn't seem to delete the old plugins, and the old XML plugin doesn't get deleted nor overwritten. Thus causing the crash.

Solution : Delete the XML plugin manually.

The problem will affect everybody with the XML plugin installed who updates from dapper to edgy.

where are old plugins installed ? i did uninstall monodevelop, search for "monodevelop" bud couldn't find anything.

~/.config/monodevelop

(it seems that it is being installed by the user, not by root, in fact it is installed automatically from the software when requested).

[Expired for monodevelop (Ubuntu) because there has been no activity for 60 days.]