Hi Rohit,
Thanks for the reply. I have new file every day ( all of them are not contacts and some do not exist in database). So approach would be
a) Read the file and add them to shared list ( Both contacts and non-contacts, i do not want to add non-contacts to Eloqua Database)
b) Add them to program step
c)Remove from the program should clear the shared list and next day there will be a new load