anchor.diff:            Console.WriteLine("DONE: Background parsing started")
             main { state with Files = Map.add file lines state.Files }
           else
  -          Console.Error.WriteLine(sprintf "ERROR: File '%s' does not exist" file)
  +          Console.WriteLine(sprintf "ERROR: File '%s' does not exist" file)
             main state
   
       | Project file ->
  
positive.code:         let file = Path.GetFullPath file
          if not (Map.containsKey file state.Files)
          then
            Console.Error.WriteLine(sprintf "ERROR: File '%s' not parsed" file)
          else
            let lines = state.Files.[file]
            if line >= lines.Length || line < 0 ||
               column > lines.[line].Length || column < 0
            then
              Console.Error.WriteLine("ERROR: Position is out of range")
            else
              let text = String.concat "\n" lines
              let opts = RequestOptions(agent.GetCheckerOptions(file, text, state.Project),
  
negative.code:         let file = Path.GetFullPath file
          if not (Map.containsKey file state.Files)
          then
            Console.WriteLine(sprintf "ERROR: File '%s' not parsed" file)
            Console.WriteLine("<<EOF>>")
          else
            let lines = state.Files.[file]
            if line >= lines.Length || line < 0 ||
               column > lines.[line].Length || column < 0
            then
              Console.WriteLine("ERROR: Position is out of range")
              Console.WriteLine("<<EOF>>")
            else
              let text = String.concat "\n" lines
              let opts = RequestOptions(agent.GetCheckerOptions(file, text, state.Project),
  