PED pedigree.dat  
   DAT impdata.dat
     fixeff 2
     animal
     record
     imprint
   end
   ANAL UNI
   MODEL
     RAN animal NRM
     RAN imprint GIN
     FIX fixeff 
     TR record
   END
   VAR animal 1
   16
   VAR imprint 1
   2
   VAR error 1
   20