I have a function that reads:
=SUMPRODUCT(VLOOKUP(D17,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Ore Fines'!$A$12:$BC$146,{4,8,12,16,20,24,28,32,36,40,44,48,52},FALSE)+VLOOKUP(D17,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Lump Ores'!$A$12:$AY$146,{4,8,12,16,20,24,28,32,36,40,44,48},FALSE))
The aim is to look for the matching date (Column D) in each relevant tab, then add up the cells corresponding to a column heading of "usage" only (the column heading repeat every 4 cells).
This returns the #N/A error; I am uncertain as to how to rectify this.
I have checked that the names, file paths, rows and columns are correct, and that any hidden rows, columns or tabs are clearly visible.
Any ideas?
Edit 1
I have use the "Evaluate Formula" Tool which gives the following results.
The first stage in the evaluation yields:
SUMPRODUCT(VLOOKUP(41370,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Ore Fines'!$A$12:$BC$146,{4,8,12,16,20,24,28,32,36,40,44,48,52},FALSE)+VLOOKUP(D17,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Lump Ores'!$A$12:$AY$146,{4,8,12,16,20,24,28,32,36,40,44,48},FALSE))
Stepping into this shows the corresponding date: 6 Apr 2013 (the date in cell D17)
The second stage:
SUMPRODUCT(#REF!+VLOOKUP(D17,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Lump Ores'!$A$12:$AY$146,{4,8,12,16,20,24,28,32,36,40,44,48},FALSE))
the third stage:
SUMPRODUCT(#REF!+VLOOKUP(41370,'D:\Temporary Storage - not backed up and unsecured\[PT current plan.xls]Lump Ores'!$A$12:$AY$146,{4,8,12,16,20,24,28,32,36,40,44,48},FALSE))
The fourth stage:
SUMPRODUCT(#REF!+#REF!)
The fifth stage:
SUMPRODUCT(#REF!)
And finally:
#N/A