Using a VAR in getData Statement

Hi All,

Does anyone know why this works:-

var TW = "36" ;

// Calculate the Shopper Stats

var ITEM_VAR = SHOPPER_STATS.getData("BASKET_ITEM_AVG", {"WEEK_NUM": TW }).value

But when I try to use a variable such as

// Get the max week

var WEEK_ARRAY = SHOPPER_STATS.getMembers("WEEK_NUM", 300) ;

var MAX_WEEK = 0 ;

WEEK_ARRAY.forEach(function(element, index) {

  if (Convert.stringToInt(element.text) > MAX_WEEK) {

  MAX_WEEK = Convert.stringToInt(element.text) ;

  }

}) ;

// Set this week and last week

var TW = MAX_WEEK+"" ;

// Calculate the Shopper Stats

var ITEM_VAR = SHOPPER_STATS.getData("BASKET_ITEM_AVG", {"WEEK_NUM": TW }).value

I get the error "Wrapped java.lang.NullPointerException: while trying to invoke the method java.lang.String.startsWith(java.lang.String) of a null object loaded from local variable 'memberKey'"

I have put TW into an alert and the number is shows me is 36 so I know that is the same.

Cheers,

James.