From another post, I adapted a similar formula to my needs as follows:
=INDEX($P$2:$P$35000,MATCH(1,INDEX(($L$2:$L$35000= $A5)*($D5=$I$1)*($O$2:$O$35000=$D5),),)).
Since the data in column D varies but is unique to that row, I repeat the
formula (with the variations) in a few columns. Basically, I am matching 3
criteria to get a text result from column P.
What I am now trying to do is prefix the formula with the "If(ISNA: function
to eliminate the no match. However, I can't figure out where the ,0 or " "
after the first formula should go. Depending on where I have tried to place
the 'blank' I get either: Too many arguments, Too few arguments or missing
parenthesis error.

Thanks in advance,

Ron Rosenberg