Using set_array and get_array

Hi,

I was trying to use set_array and get_array commands but its not giving any output.

PFB my code:

<?xdoxslt:set_variable($_XDOCTX, 'pay_count', 0)?>

<?for-each-group:DEVICES;./DEVICE_ID?><?if: DEVICE_ID='AR Items'?><?for-each:current-group()?><?if: NAME='Payment'?><?xdoxslt:set_array($_XDOCTX, 'Payment_table', xdoxslt:get_variable($_XDOCTX, 'pay_count'), TRANS_ID)?><?xdoxslt:get_array($_XDOCTX, 'Payment_table', xdoxslt:get_variable($_XDOCTX, 'pay_count') )?><? xdoxslt:set_variable($_XDOCTX, 'pay_count',  xdoxslt:get_variable($_XDOCTX, 'pay_count')+1)?><?end if?><?end for-each?><?end if?><?end for-each-group?>

In the above code,basically I am trying to put the TRANS_IDs in an array named 'Payment_table' and calculating the array index using the variable 'pay_count'.