Handle exception on Ajax jsonp return

Personally I'm calling the service this way:

$.ajax({
    url: minhaurl,
    type: "GET",
    dataType: "jsonp",
    contentType: "application/json; charset=utf-8",
    async: false,
    success: function (result, status, request) {
        console.log('sucesso');
    },
    error: function (request, status, erro) {
        console.log('sucesso');
    }
});

When I get service success the expected return is json equal to this:

callback({"d":{"Mensagem":"","Id":"1000","DDD":"0011","Telefone":"999999999","Fax":"999999999","Flag1":true,"Segmento":"A","Horario_diferenciado":null,"Caixa_exclusivo":"1","CaixaEletronico":null,"Nome":"Nome da agencia","Endereco":"Rua A","Cep":"09050-380","Uf":"SP","Cidade":"SAO PAULO","Bairro":"PQ BANDEIRANTE","Abertura":"10h:00","Fechamento":"16h:00","Longitude":-46.641869,"Latitude":-23.634659,"Imagem":"icone.png"}});

When I get service error the return is this:

callback({"Message":"Object reference not set to an instance of an object.","StackTrace":"   at Banco.WS.BuscadorAgencias.BuscaAgenciaPorNumero()","ExceptionType":"System.NullReferenceException"});

The problem is that even writing success and error, when the error occurs I can not handle it.

The browser console displays the error:

  

jquery-1.11.3.js: 9836 GET   myurl & callback = jQuery111306013578134038797_1477314780144 & _ = 1477314780145