Where do I insert ISERROR?

[ACurtis802]

Hi everyone,

I am using an array formula like this in cells A2:H100 of a worksheet:

=INDEX('Source Data'!$A$2:$Q$5000,SMALL(IF(('Source Data'!$I$2:$I$5000>=$O$1)*('Source Data'!$I$2:$I$5000<=$P$1)*('Source Data'!$M$2:$M$5000>0),ROW('Source Data'!$A$2:$Q$5000)-ROW('Source Data'!$A$2)+1,ROW($Q$5000)+1),ROW()-1),1)

The function must be present in all 99 rows to accommodate potential data, but there is rarely enough data to populate the entire sheet, leaving #REF! errors in some cells.

Putting aside that using this many array formulae is sloppy programming, how do I craft the function above to return no value if the function evaluates to an #REF! error?

Thanks and best regards,
Anthony