Hi:
In your formula
=IF([@Year]>=2017,(1+VLOOKUP([@Year],'C:\Kim_Master\Daily\Active_ZenSale_2016-08-8.xlsm'!YrOYr[#Data],2,FALSE))*(SUMPRODUCT((AType="Sale")*(ADay=[@Day])*(AMonth=[@Month])*(AYear=[@Year]-1)*AData)/COUNTIFS(ADay,B34,AMonth,E34,AYear,F34)),[@Goal])
The colored part is showing a reference error ,your formula till row 34 worked because the if condition at the beginning of your formula is not satisfied hence the formula is returning the the figure in column K.
Thanks