I need the x,y,z coordinates of edges of a Compound. I use TopExp_Explorer to iterate thru all edges and than use BRep_Tool::Curve on each edge to extract curve points. Now I have a STEP file which contains two short edges. If I use the BRep_Tool::Curve on these edges the parameters first and last are set to -2.0e+100 and 2.0e+100 and I cannot get these curve coordinates. IsCurve3D() applied on the edge returns true. Do I have any other possibility to get these curve coordinates?