Ok thanks, looks like a great program. Having trouble with the function now. Here is the code that I used with the plain INDIRECT function which works:
=AVERAGE((INDIRECT("'[File Name.xls]Sheet1'!G"&$R4)), (INDIRECT("'[File Name.xls]Sheet1'!M"&$R4)), (INDIRECT("'[File Name.xls]Sheet1'!T"&$R4)))
And here it is with INDIRECT.EXT, which doesn't work:
=AVERAGE((INDIRECT.EXT("'C:\Folder\[File Name.xls]Sheet1'!G"&$R5)), (INDIRECT.EXT("'C:\Folder\[File Name.xls]Sheet1'!M"&$R5)), (INDIRECT.EXT("'C:\Folder\[File Name.xls]Sheet1'!T"&$R5)))
Can the file name have a space in it? It can with INDIRECT.