Value cannot be null. (Parameter 'type')   at System.ArgumentNullException.Throw(String paramName)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
   at Services.ExportService.ToVisio(String svg) in C:\Development\TFS\balkan.app\BALKAN\serverjs.balkan.app\Services\ExportService.cs:line 171
   at Controllers.ExportController.TestVSTX() in C:\Development\TFS\balkan.app\BALKAN\serverjs.balkan.app\Controllers\ExportController.cs:line 151