Hi Sharat
Am confused as to why you needed to create SE37 function group before creating BRF+ rule
Also, if you used the IMG path to generate a BRFplus rule you and chose options to create decision table (head) it would have created the decision table structure for you. You do not delete line item result as the program looks for this (how is this avoiding confusion?)
Whatever you are doing, I think you are at the stage where you need to add screen shots of creating the BRFplus rule and adding to configuration