If you can even mention your client script code that would be a bit more helpful 

Thanks,

Siva

Hi Siva,

here's the client script:

function onLoad() {

//look up sys_user_delegate table and populate "my_delegates" field

var user = g_form.getValue('current_user');

var gr = new GlideAjax('AjaxGetDelegates');
gr.addParam('sysparm_name','getDelegates');
gr.addParam('sysparm_user',user);
gr.getXML(setDelegates);

//populate the my_delegates field
function setDelegates(response){
var answer = response.responseXML.documentElement.getAttribute("answer");
alert('answer is '+answer);
if(answer == '' || answer == undefined){
return false;
}else{
var arr = answer.split('||');

if (window === null)

g_form.setValue('my_delegates',arr);
}
}

Just after running an initial run in Background script i think the issue you are facing is getting a single sys id in your result if i am not wrong 

Just modify your code a little bit as below 

var dels = delegates.delegate.toString(); //field on the delegate table I want to return 

and that should work

i have run this in my background script and its working 

var delList = [];

while(delegates.next()){
var dels = delegates.delegate; //field on the delegate table I want to return
delList.push(dels);
//delList = delList + delegates.delegate+',';
}
var arrayUtil = new ArrayUtil();
delList = arrayUtil.unique(delList);
return delList;
}

Hope this helps 

Mark this response as correct if that resolves your query 

Thanks,

Siva

so with a gs.info log I'm seeing the correct array get built, but this is what the alert in the client script is showing.  Odd???