I am very new to BOPF. I want to call another BOPF for creating entry into a custom table from action of one BOPF. Suppose there is BOPF for item display and there is a button in it "Add Cart". Now clicking on the button selected items will be added to cart table in the backend. Now the button click will be having an action. On that action, the Cart BOPF will be called and data will be inserted to the corresponding cart table.