Hi Praveen
I think that you should already solve your problem, but anyway, I found a solution for this.
You can get this 'RELEASED' status through the interface /sapsrm/if_pdo_bo_ctr, method release.
Try this sample code:
lo_msg_consumer = NEW /sapsrm/cl_pdo_msg( ).
lo_pdo_ctr = /sapsrm/cl_pdo_factory_ctr_adv=>get_instance( iv_header_guid = lv_guid
iv_mode = lv_mode ).
lo_pdo_ctr->/sapsrm/if_pdo_bo_ctr~release( CHANGING co_message_handler = lo_msg_consumer ).
CALL FUNCTION 'BBP_PROCDOC_RESET_BUFFER'.
COMMIT WORK.
Regards