cannot set deletion flag for order

Dear Experts,

I am trying to set deletion flag for order XXXX,

i am getting Error Massage " You cannot set deletion flag for order XXX (see log) Message no. CO432"

my order status is REL CNF DLV PRC GMPS MACM OPGN SETC

How can i set deletion flag for order.....

Please give your suggestion.

Thanks for support.......