thanks LVDH, the new version works a treat. All the pp works too
however, i'd like a little help please. i'm introducing a new double layer front wing somewhat akin to TF's and I don't understand how to make it work. I get a high pressure region filling all the vertical space between the elements and low pressure on top of the upmost wing and on the bottom of the lowest wing. They're not working as two individual wings even though one is at the top of the allowable volume and the other is at the bottom. they have plenty of space between them vertically. i'm so baffled. last year with occfd and wflow I had no such issues. as a result i'm getting cl(f) as positive...