Omnisharp not detecting already started server

[henrik-schopmans]

I try to use OmniSharp for asp.net vnext stuff, so I do not have a solution file. I start the server separately using
mono OmniSharp.exe -p 2000 -s "~/path/to/my/project"
Unfortunately when I enter vim, I get an error that the server couldn't be started due to missing solution file. It looks like it doesn't detect my already started server. When starting the server, I get this error message:

Monodoc documentation tree could not be loaded.System.IO.FileNotFoundException: Could not find file "/usr/lib/monodoc/monodoc.xml".
File name: '/usr/lib/monodoc/monodoc.xml'
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0 
  at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0 
  at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
  at System.Xml.XmlUrlResolver.GetEntity (System.Uri absoluteUri, System.String role, System.Type ofObjectToReturn) [0x00000] in <filename unknown>:0 
  at Mono.Xml2.XmlTextReader.GetStreamFromUrl (System.String url, System.String& absoluteUriString) [0x00000] in <filename unknown>:0 
  at Mono.Xml2.XmlTextReader.ReadTextReader (Int32 remained) [0x00000] in <filename unknown>:0 
  at Mono.Xml2.XmlTextReader.PeekChar () [0x00000] in <filename unknown>:0 
  at Mono.Xml2.XmlTextReader.ReadContent () [0x00000] in <filename unknown>:0 
  at Mono.Xml2.XmlTextReader.Read () [0x00000] in <filename unknown>:0 
  at System.Xml.XmlTextReader.Read () [0x00000] in <filename unknown>:0 
  at Mono.Xml.EntityResolvingXmlReader.Read () [0x00000] in <filename unknown>:0 
  at Mono.Xml.DTDValidatingReader.ReadContent () [0x00000] in <filename unknown>:0 
  at Mono.Xml.DTDValidatingReader.Read () [0x00000] in <filename unknown>:0 
  at Mono.Xml.Schema.XsdValidatingReader.Read () [0x00000] in <filename unknown>:0 
  at System.Xml.XmlValidatingReader.Read () [0x00000] in <filename unknown>:0 
  at System.Xml.XmlDocument.ReadNodeCore (System.Xml.XmlReader reader) [0x00000] in <filename unknown>:0 
  at System.Xml.XmlDocument.ReadNode (System.Xml.XmlReader reader) [0x00000] in <filename unknown>:0 
  at System.Xml.XmlDocument.Load (System.Xml.XmlReader reader) [0x00000] in <filename unknown>:0 
  at System.Xml.XmlDocument.Load (System.String filename) [0x00000] in <filename unknown>:0 
  at Monodoc.RootTree.LoadTree (System.String basedir, Boolean includeExternal) [0x00000] in <filename unknown>:0 
  at MonoDevelop.Projects.HelpService.InitializeHelpTree () [0x00000] in <filename unknown>:0 

But then the server still prints
OmniSharp server is listening

Does anyone have an idea on how to fix this? Btw., I saw that there is OmnisharpRoslyn on its way, is that already usable?

[nosami]

The Monodoc error is safe to ignore.

Yeah, good progress is being made with omnisharp-rolsyn OmniSharp/omnisharp-roslyn#29.

It's currently not compatible though because omnisharp-vim sends requests using form url-encoded, whereas omnisharp-roslyn currently only accepts json requests in the form body OmniSharp/omnisharp-roslyn#27 .

Apart from that minor detail, it should work. I've since defected to the emacs camp though, so I don't have a great deal of motivation to look at this. Fancy taking a look at it?

[henrik-schopmans]

Since I'm still quite a novice, it's probably gonna remain at a look :D. But maybe I can just get the normal server somehow working for me.

[nosami]

You can definitely get the original server working this way. Looks like you already have.

Don't expect to get completions for aspnet5 stuff though. It won't work.

[henrik-schopmans]

Mhh, tried it another time, but still can't get it working. When I have a solution file, everything works fine, but when I start the server manually, it still tries to start the server on startup of vim, but fails due to missing solution file.
When i use
let g:Omnisharp_start_server = 0
I get a single error on startup:
Unable to find csc.exe
And this error only happens when I started the server manually, otherwise nothing happens. How could I solve that error?

[nosami]

OmniSharp doesn't reference csc.exe anywhere. What other plugins do you have installed?

[markwoodhall]

I know this is old and you probably figured it out already but if you have vim-csharp plugin installed that will reference csc.exe for its C# compiler.

[JamesMcMahon]

@markwoodhall Thanks for that tip. There is an open issue in the vim-csharp plugin repo.