Error: SSS_NOT_YET_SUPPORTED

Hi All,
Can anybody suggest any remedy for the below error?

An unexpected error occurred in a script running on this page.

saveRecord (saveRecord)
customscript_jnlvclientv2

SSS_NOT_YET_SUPPORTED

I am trying to execute the code below:

var arrSearchResults = nlapiSearchRecord('customrecord_parentbudget','customsearch_custombudgetsearch',null,null);
for(var j=0; j<arrSearchResults.length; j++)
{
   var searchresult = arrSearchResults[j];  
            var budgtRecID = searchresult.getValue('internalid');
   alert(budgtRecID);
   var budgetRec = nlapiLoadRecord('customrecord_parentbudget',budgtRecID);
var budgetYear = budgetRec.getFieldText('custrecord_budget_period');
}

In the last line while I'm trying to fetch 'budgetYear', I am getting the above error. Is this any version error? I tried different browser as well, with no hope.:h_a_w: