Formula not returning correctly

[ExcelRoy]

Hi all,

I have the following formula that works for any number over=IF(C3&I3="","",IFERROR(LOOKUP(9.99999999999999E+307,1/(($BJ$3:$BJ$5002=C3)*($BK$3:$BK$5002=I3)),$BV$3:$BV$5002),"Backorder"))

This seems to work fine but not when BV returns 458429

Any ideas why?

Thanks

 

[RoryA]

What do you mean by doesn't work? What happens? (there's nothing mystical about that number)