Lenchik wrote:
=SUMPRODUCT(--(('path[FileA.xls]Tab1'!G3:G250 [...???...]
TIME(0,15,59))*(LEN('path[FileA.xls]Tab1'!Q3:Q250)=0)))

I use array formulas rather than SUMPRODUCT and would think this would
work (entered with Ctrl+Shift+Enter):

=SUM((('path[FileA.xls]Tab1'!G3:G250-'path[FileA.xls]Tab1'!F3:F250)
=TIME(0,16,0))*(LEN('path[FileA.xls]Tab1'!Q3:Q250)=0))

Bill Manville
MVP - Microsoft Excel, Oxford, England
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