I an trying to iterate over each line item in a kit using the following code: 

    var kit = nlapiLoadRecord('kititem',kitId);
    var lineCount = nlapiGetLineItemCount('member');
    var itemId;
    var qty;
    var members = new Array();
   
    for(i=1;i<=lineCount;i++){
        nlapiSelectLineItem('member',i);
        itemId = nlapiGetCurrentLineItemText('member','item');
        qty = nlapiGetCurrentLineItemValue('member','quantity');
          
    }

For some reason I am returning -1 for the line count. The records browser shows the sublist id is member and the record type of kititem is correct.

If I open the internal ID being passed into the method I am able to verify it has data. If I set a breakpoint within the debugger I am also able to show data.