Nav report 2009 to 2016

Hi to all.

I searched my problem internet but can't find a solution. So i am writing here.

We are upgrading Nav Version. And I am working on reports.

First, I Export 50XXX report as txt(2009). Then, I tried to Import to Nav 2016. But have a problem. The message box says : "You cannot import an object that does not have a DATASET section"

1. Q) How i can handle this problem?
2. Q) What is the best way for report upgrade? Many people says in internet : "You need upgrade 2013 first, and then to 2016"

thank for your helps,
Have a nice days.