Hi Diwakar and Bijay Kumar ,
Thanks for posting your replies. They helped me understand the scenario. But One last question. What if I uncheck the multiple posting flag in the NACE screen for a particular output type and keep the operation of triggering of the same output as 2.change . Will it still generate a new output ?? Technically it should not right coz I have removed the multiple postings flag in NACE. Help me with this 