How to loft between a square and a circle?
 

As the title says, how can I make a loft between a square and a circle in Star CCM+?

Split the circle into 4 equally partitioned arcs.

I found out. I tried to loft a square surface together with a circular surface and it doesn't work. First I lofted the outer edges together, and then I performed a loft cut between the inner edges.