Dear sifu,
I'm using "IFERROR" function in Excel 2010 and save as .xlsx file.
Example : =IFERROR(VLOOKUP(H1,Sheet1!$C$1:$E$100,2,FALSE)," ")
When I open with excel 2007 and 2003, the cell with this formula will return as #NAME.
Is "IFERROR" function not available in excel 2007 & 2003...