Sheet metal - flat pattern view not generating

Morning,

I am having an issue with sheet metal feature in solidworks 2017 sp1.0. When I go to import my flat pattern view into my drawing it is not unloding it. I get an error in my model and the only way to fix it is edit the flat pattern sketch and delete all my dimensions and relations. Any idea what I might be doing wrong in 2017 that is different from 2016 and prior? Possible bug?

SolidworksParts And Features