Mono won't open files, Illegal Characters in path

I keep getting this error: The project folder is located in C;\ and worked fine yesterday, this has happened to other projects as well, some open some don't.

System.TypeInitializationException: The type initializer for 'NGit.Util.FS' threw an exception. ---> System.ArgumentException: Illegal characters in path.

at System.IO.Path.CheckInvalidPathChars(String path)

at System.IO.Path.Combine(String path1, String path2)

at Sharpen.FilePath..ctor(String other, String child) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\Sharpen\Sharpen\FilePath.cs:line 30

at NGit.Util.FS.SearchPath(String path, String[] lookFor) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Util\FS.cs:line 279

at NGit.Util.FS_Win32_Cygwin.IsCygwin() in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Util\FS_Win32_Cygwin.cs:line 62

at NGit.Util.FS.Detect(Nullable`1 cygwinUsed) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Util\FS.cs:line 99

at NGit.Util.FS.Detect() in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Util\FS.cs:line 67

at NGit.Util.FS..cctor() in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Util\FS.cs:line 60

--- End of inner exception stack trace ---

at NGit.BaseRepositoryBuilder`2.SetupWorkTree() in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit\BaseRepositoryBuilder.cs:line 753

at NGit.BaseRepositoryBuilder`2.Setup() in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit\BaseRepositoryBuilder.cs:line 679

at NGit.Storage.File.FileRepository..ctor(FilePath gitDir) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Storage.File\FileRepository.cs:line 111

at NGit.Storage.File.FileRepository..ctor(String gitDir) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\contrib\NGit\NGit.Storage.File\FileRepository.cs:line 127

at MonoDevelop.VersionControl.Git.LocalGitRepository..ctor(String path) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl.Git\MonoDevelop.VersionControl.Git\GitRepository.cs:line 1478

at MonoDevelop.VersionControl.Git.GitRepository..ctor(FilePath path, String url) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl.Git\MonoDevelop.VersionControl.Git\GitRepository.cs:line 71

at MonoDevelop.VersionControl.Git.GitVersionControl.GetRepositoryReference(FilePath path, String id) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl.Git\MonoDevelop.VersionControl.Git\GitVersionControl.cs:line 61

at MonoDevelop.VersionControl.Git.GitVersionControl.GetRepositoryReference(FilePath path, String id) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl.Git\MonoDevelop.VersionControl.Git\GitVersionControl.cs:line 65

at MonoDevelop.VersionControl.Git.GitVersionControl.GetRepositoryReference(FilePath path, String id) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl.Git\MonoDevelop.VersionControl.Git\GitVersionControl.cs:line 65

at MonoDevelop.VersionControl.VersionControlService.GetRepositoryReference(String path, String id) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl\MonoDevelop.VersionControl\VersionControlService.cs:line 199

at MonoDevelop.VersionControl.VersionControlService.GetRepository(IWorkspaceObject entry) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl\MonoDevelop.VersionControl\VersionControlService.cs:line 185

at MonoDevelop.VersionControl.Views.SubviewAttachmentHandler.AttachViewContents(Document document) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl\MonoDevelop.VersionControl.Views\SubviewAttachmentHandler.cs:line 47

at MonoDevelop.VersionControl.Views.SubviewAttachmentHandler.HandleDocumentOpened(Object sender, DocumentEventArgs e) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\addins\VersionControl\MonoDevelop.VersionControl\MonoDevelop.VersionControl.Views\SubviewAttachmentHandler.cs:line 71

at MonoDevelop.Ide.Gui.Workbench.OnDocumentOpened(DocumentEventArgs e) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 988

at MonoDevelop.Ide.Gui.Workbench.WrapDocument(IWorkbenchWindow window) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 577

at MonoDevelop.Ide.Gui.ViewCommandHandlers..ctor(IWorkbenchWindow window) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\ViewCommandHandlers.cs:line 49

at MonoDevelop.Ide.Gui.SdiWorkspaceWindow..ctor(DefaultWorkbench workbench, IViewContent content, Notebook tabControl, TabLabel tabLabel) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\SdiWorkspaceWindow.cs:line 98

at MonoDevelop.Ide.Gui.DefaultWorkbench.ShowView(IViewContent content, Boolean bringToFront) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\DefaultWorkbench.cs:line 381

at MonoDevelop.Ide.Gui.LoadFileWrapper.Invoke(String fileName) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 1093

at MonoDevelop.Ide.Gui.Workbench.RealOpenFile(FileOpenInformation openFileInfo) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 772

at MonoDevelop.Ide.Gui.Workbench.OpenDocument(FilePath fileName, Int32 line, Int32 column, OpenDocumentOptions options, String encoding, IViewDisplayBinding binding) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 390

at MonoDevelop.Ide.Gui.Workbench.OpenDocument(FilePath fileName, Int32 line, Int32 column, OpenDocumentOptions options) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide.Gui\Workbench.cs:line 331

at MonoDevelop.Ide.IdeApp.<>c__DisplayClass10.<OpenFiles>b__d(Object , WorkspaceItemEventArgs ) in c:\BuildAgent\work\6b3beae2de4b9011\monodevelop\main\src\core\MonoDevelop.Ide\MonoDevelop.Ide\Ide.cs:line 334

 

Bump, no ideas?

 

I know this is old, but I'm posting this here in case anyone else has the same issue (like I did).

This can sometimes happen if your project is in a Git repository. Windows+Git+MonoDevelop is a lethal combination. To fix this, go into MonoDevelop -> Tools -> Add-in Manager -> Version Control - and then disable Git support.

 

Thanks, this is exactly the combo I was using and was having this error. I can confirm this fixes it!