Surface loft will not flatten

Hello,

I have been racking my brain on this and can't seem to figure it out.  I have a sheetmetal (3/16") part that I need to replace for a customer, it has two different bend lines and is also smaller on one side than the other.  I have a surface loft that seems to be correct for the dims, but now I cant convert to sheetmetal so that I can flatten it and give to the shop guys to fab. Each time I try to convert to sheet metal I get the error about non-planer faces

I am using SW 14 standard.

SolidworksSheet Metal