i attach my hip file.

i have problem when trimming a a profile on a nurbs surface.
in this case, the problem appear if i use a revolve node as the base surface. after projecting, the trim give me an ‘ugly’ result.
there's no problem if i project it on sphere or grid nurbs.

can anyone help.

thx.

It should work fine if you check the Wrap Last to First parameter in the Join SOP.