Sweep feature shows preview, but freezes solidworks upon generation

Hi All;

I am trying to generate a swept profile using a path and 2 guide curves. The preview shows up and looks OK - but when I click the check mark to generate the feature, my SolidWorks just calculates forever and eventually I have to kill it.

SolidWorks runs pretty slow on my hardware, so I can't tell if I've actually drawn something wrong, or if my computer simply can't handle the crunching.

I've attached the file in question - you will see the sketches all labelled as per their function in the sweep. You can ignore the "Wallcontrol" part, the one I am working in is the "Wallcontrol-cover" derived part.

Thanks!

SolidworksParts And Features