I have created MRP group with following control parameters
Planning horizon 20 days
Creation indicator -- PR in opening period
Opening period in material master 10 days
I have requirement on 3.04. 2012 andi put planning date in Md01 6.03.2012 ( 3.04. 2012 --- 20 days ) then MRP does not create any procurement proposal.
Stock is zero.
Planning horizon for plant is 1 day.