Compiling Error: Xamarin.iOS.Common.targets

Xamarin Studio 6.0(build 5174)

From Errors:

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets: Error: Error executing task ReadItemsFromFile: Name cannot begin with the '<' character, hexadecimal value 0x3C. Line 3, position 2.

From LogFile:

Target _ReadCoreCompileInterfaceDefinitions:
/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets: error : Error executing task ReadItemsFromFile: Name cannot begin with the '<' character, hexadecimal value 0x3C. Line 3, position 2.
Build FAILED.
Errors:

    /Users/simplesolutionsMAC/Documents/Projectos/JunaNote/iOS/JunaNote.iOS.csproj (Build) ->

/Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets (_ReadCoreCompileInterfaceDefinitions target) ->

        /Library/Frameworks/Mono.framework/External/xbuild/Xamarin/iOS/Xamarin.iOS.Common.targets: error : Error executing task ReadItemsFromFile: Name cannot begin with the '<' character, hexadecimal value 0x3C. Line 3, position 2.

         0 Warning(s)
         1 Error(s)

    Time Elapsed 00:00:00.2195200