code migration ax 2009 -> 2012

hi all,

I am right now upgrading the code from ax 2009 to ax 2012 r1

i m going through the upgrade checklist

and in prepare application data for preprocessing

in ‘unit conversion’ upgrade…

i m getting the following error while i click on validate button.

The combination of the From unit Each, the To unit Inch and no item specified includes different values for the factor. Specify the same factor for all lines with this combination.