generic service request parameter - "settings.data not found"

[hawadi]

Hello,

I've been following the generic service tutorial on the appery docs but the console in firebug keeps giving me the error "settings.data" not found or "data is null".

Here is my generic service code:

code
process: function(settings) {
settings.beforeSend(settings);
if (this.requestOptions.echo) {
settings.success(this.requestOptions.echo);
} else {
var groupID = settings.data.GroupID;
if (groupID === '') {
var info = localStorage.getItem("employee_info");
settings.success(JSON.parse(info));
}
else {
var infoFilter = localStorage.getItem("employee_info");
var groupFilter = getByKey(groupID);
settings.success(JSON.parse(groupFilter));
}
}
settings.complete('success');
}
/code

Am I doing something wrong?