Release sales order lines , 4000 lines in each sales order

Dear Gurus,

I have 4 sales orders where each order is having 4000 lines each.

Now the user is unable to release the hold from the Front end.

So , I decided to develop some script to release the hold , for this i developed a procedure  where the agenda is to release the hold . the script is as follows.

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create or replace 

PROCEDURE      XXONT_RELEASEHOLDS (p_user_name         VARCHAR2,

                                               p_order_num_low     NUMBER,

                                               P_Order_Num_High    Number

                                               ) IS

 CURSOR cur_orders_hold

   IS  

      SELECT  

               hdra.header_id

               ,hdra.order_number

               ,hsrc.hold_source_id

               ,hsrc.hold_id

        FROM   oe_order_headers_all hdra,