maybe you can give it another try with FM
/sapapo/dm_order_maintain
IV_LOGSYS ERPCLNT100
IV_OBJECTTYPE 6
IV_APPLICATION I
Same parameters as /SAPAPO/CIF_ORDER_INBOUND
maybe you can give it another try with FM
/sapapo/dm_order_maintain
IV_LOGSYS ERPCLNT100
IV_OBJECTTYPE 6
IV_APPLICATION I
Same parameters as /SAPAPO/CIF_ORDER_INBOUND