Assuming your times are in Col A&B and Names in Col D
then in C1 enter
=B1-A1 and copy down...

then in the other file enter this in, say, A1
=SUMPRODUCT(--(('PATH[FileName.xls]TABNAME'!$C$1:$C100)<TIME(0,16,00)),
--(('PATH[FileName.xls]TABNAME'!$D$1:$D$6)<"D1"))
and copy down
To get my email id paste my address in an Excel cell and press Enter...
Adjust 100 to your range

"Lenchik" wrote:

Hello,
My excel file collects information from another excel file, where I
have three columns: start_time, end_time, and another cell that is
suppose to contain a name of the person. Within one range (3-250) I
need to subtract end_time from start_time and see if it's less than
16
minutes, if so, if the third cell, does not contain the name, I need
to count all the occurances and record the number into the cell of
the
correct file.
I cannot quite figure out how to perform subtraction within the range
(in this case: column G - column F):
=SUMPRODUCT(--(('path[FileA.xls]Tab1'!G3:G250 [...???...]
TIME(0,15,59))*(LEN('path[FileA.xls]Tab1'!Q3:Q250)=0)))

Thanks a ton for your advice!