CATIA sweep

i need to make a surface using splines by sweep command as per drawing attached but it ain't working.
please help me out.

Accepted answer

Hi, Sweep with two guide curves, with the right button on the dorsal,
replace the default sketch with z


2 Other answers

Is it possible to cover that upper remaining portion in same command?

Hello,
you could use the "loft" command instead of "sweep" (which is actually a special case of loft).
You must define as initial and final sections (there can be more and not just one as in the sweep). If you don't specify guide curves it will use lines between the two sections, but you could use guide lines anyway.
Best regards