Problem with BRepOffsetAPI_MakeFilling

Hi to all,

i've a strange problem with BRepOffsetAPI_MakeFilling. I want to create a face from a wire. the wire has 4 edges of which 2 are segment and 2 are arc od circle. The wire is like a contourn of a cylinder. THe problem is that...when the lenght of the arcs is less than πr the algorithm works well..but if the length arcs is > of πr then the API fails with a Standard_Failure.

Have someone a suggestion? thanks in advance!

ps. can suggest another method to build this face?thanks!