produce text result instead of #NUM! result in array formula

Hi there

This array formula returns the smallest value, from cells in the column b range that contain values greater than zero and have blank cells next to them column A. At the moment, if all excel cells in the column b range that have a value greater than zero have non-blank cells column A, then i get #NUM!
How can I adjust this array formula so that instead of getting #NUM! in this circumstance, i get "Finished"?
There will always be a value greater than zero in the column b range.

{=SMALL(IF(A5:A1048576="",IF(B5:B1048576>0,B5:B1048576)),1)}

Thanks
stuartzz

To best describe or illustrate your problem you would be better off attaching a dummy workbook. The workbook should contain the same structure and some dummy data of the same type as the type you have in your real workbook - so, if a cell contains numbers & letters in this format abc-123 then that should be reflected in the dummy workbook.

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Something like this?

=IFERROR(SMALL(IF(A2:A11="",IF(B2:B11>0,B2:B11)),1),"Finished")