Split & trim fail

Hi all,

Relative newbe here.

Can anyone explain what the issue(s) are with the attached model? The pillar was made using a loft command to get the slight faceted effect.

I need to trim the pillar at an angle illustrated by the cutting plane. However, both trim and split fail on some of the surfaces, and on those surfaces that are split or trimmed, the cut is distorted.

Many thanks for any help you can give…

PaulSplit fail.3dm (2.5 MB)

change absolute tolerance to 0.001

Thank you Cyver! I was obviously not paying attention during that lesson!