BugSplat! in SketchUp when using SteelSketch plugin, any idea?

My guess is your Num Segs setting is forcing creation of new geometry less than SU’s 0.001” min.
72 segments is overkill.

Experiment … What happens when the Num Segs is set at 12 ?

Have you sent the error report? If it’s a bug, it will be of help for the Trimble team …

Same inputs here but extrude path not same, but for case set up works ok.
From you initial post looks like you have extruded ok before?
Attaching total file could help folks doing trouble shooting at the ranch?

Thank you sir, i think it help.