This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
What's the expected data from sheet.getDataRange().getValues()?
You are looping the data from position 1 (for var i = 1...) is that correct? Also which kind of Object is data? Is it an Array, an Object, a custom Object? You have to provide us with more information to be able to help.