Hi Faisal,
See , it's not about the possibility of calling order_save , it's about feasibility. If I have provided a number range of id : 10,000 to 29,000 and consider a number loss if the user presses enter ( order gets saved ) but then he doesn't want it to save and instead presses cancel ( I have to delete the order , the id gets wasted ) plus the performance is lost for saving and deleting the order for no reason.
Hence, this is not a good solution to realize. I already had this is mind and I know people usually follow this but if CRM Web-UI has this functionality working fine on the RFC framework then there should be some work-around.
In fact even the LORD functionality works on the RFC framework and there no repetitive saves are done on each round trips.
/Hasan