I am getting mixed messages from Solidworks with the trim/extend tool. I have extended the angle on the right to the curved surface:
But when I try to do it on the left, I either get this:
Or, if I don't select the trimming face first, I get this message:
Which is it? I was able to select the same surface on one member, but when I do it for another member, it tells me that it can't because "Only bodies created by Weld Member features can be used?"