Hi krishna_murthy,
Try to use DateTime.From instead of DateTime.Add:
Table.AddColumn("Proofered Column", "HwDateTime", each DateTime.From([order_items]) + #duration(0,5,30,0))
Or even Simpler:
Table.AddColumn("Proofered Column", "HwDateTime", each [order_items] + #duration(0,5,30,0))
if this post helps, then I would appreciate a thumbs up and mark it as the solution to help the other members find it more quickly.
