I used to be able to get them to work, now they don’t. if i follow zak parrish’s tutorial the meshes come out mangled. I found a simpler tutorial to cut out all the array work and then once they’re working elaborate from there but i still can’t get them to work. no matter what i do i can’t alt-drag out a new spline.
okay,
embarrassing but i was being dumb. i wasn’t running the spline mesh add off the loop. feel free to mock. 
But did you ever open the same project twice and pondered why you can’t save your stuff?!