1:2 Message Mapping WithOut BPM - Split mapping created no messages Error

Hi,

I am a new-bie to SAP PI and am trying out the following scenario without BPM.

Make multiple files based on Age received from input file.Input File contains Name,DOB and Output File contains Name, Age.

I want to create 2 files, one containing details of people with Age <21 and the other output file containing details of people with Age >= 21.

To acheive this,

In IR, I created 2 DT and 3 MT,1 MM with 2 Target MT,both having occurences 0..unbounded, 1 IM with 2 Target MI,both having occurences 0..unbounded

And in ID, 1 Sender Agreement, 2 Receiver Agreement, 1 Receiver Determination, 1 Interface Determination using Enhanced Interface Determination.

When i run this scenario, I am getting the following error "Split mapping created no messages"

Please let me know how can I resolve it.