Erro Validação Vraptor 3 Estranho

9/01/2013 16:05:55 org.apache.catalina.core.StandardWrapperValve invoke
GRAVE: Servlet.service() for servlet [default] in context with path [/EquipControl] threw exception
br.com.caelum.vraptor.InterceptionException: There are validation errors and you forgot to specify where to go. Please add in your method something like:
validator.onErrorUse(page()).of(AnyController.class).anyMethod();
or any view that you like.
If you didn't add any validation error, it is possible that a conversion error had happened.

@Path("/usuarios/actionGrid")
	public void actionGrid(String oper, String nome, String email, String usuario, String password,Long id){
		Usuario user = new Usuario();
		user.setId(id);
		user.setEmail(email);
		user.setNome(nome);
		user.setUsuario(usuario);
		user.setPassword(password);

		//edit
		if(oper.equals("edit")){
			dao.update(user);
			System.out.print("Editado com Sucesso!");
		}
		
		//Delete
		if(oper.equals("del")){
			dao.delete(user);
			System.out.print("Delete com Sucesso!");	
		}
		
		//add
		if(oper.equals("add")){
			dao.insert(user);
			System.out.print("Cadastrado com Sucesso!");
		}
		
		result.redirectTo(this).index();
		
	}