Previously when I have been doing upgrades it has always been best practice to import both the old standard version, the old custom version and the new standard version into the same client, so that the text files you exported would have the exact same "layout".
But since we can no longer import old versions of FOB's into 2013, then this method is no longer useable. Or is it?
What is the best practice for upgrading from NAV 2009 R2 to NAV 2013 using Mergetool? Not so much in terms of the steps to do (they are more or less as they have always been), but in terms of how to export the text files we need to import into Mergetool for the compare?