The use of navigation page and size are missing in Get(string, string, string, string, string, string, string[], string[]) implementation in Provider. It can be added it by doing this: `uint? navigationPage = HttpUtils.GetNavigationPage(Request.Headers); uint? navigationPageSize = HttpUtils.GetNavigationPageSize(Request.Headers); TMultiple objs = service.Retrieve(conditions, navigationPage, navigationPageSize, ..`