Hi Mat, it sounds like you may have this figured out already, but just in case:

> Trying to do a sweep of multiple circular profiles on a single curving rail...I get "calculation failed". The sweep
> works fine doing them one by one...but time consuming.
>
> Is there a way to sweep a group of profiles?

You can use multiple profiles in sweep, but it's for making a sweep that changes its profile as it moves along the sweep rail, so it's expecting the profiles to be at different stations along a single rail not a lot of them stacked up all on the same position on the rail.

You can sweep a single profile along multiple rails though, to do that draw your circle flat on the cplane off to the side outside the bounding box of the rail, that's so you'll get "autoplace" mode enabled for the sweep. Then you can select just that one profile, run Sweep and select all your rails and it should generate sweeps along each one.

- Michael