Sketchup 2017 loses line closing surface after save

When I complete close a surface, Sketchup fillis it in the surface as expected. I hit C trl-s to save and the line closing the surface is lost. I am running Sketchup 2017 on Windows 10.

Before


Put line in and hit enter

hit ctrl-s and it loses the line. Goes back to the before state
cap 53.skp (4.0 MB)

ttached is the model.

Any suggestions are appreciated
Thanks
Al

The geometry seems to be pretty messy. First thing I would do is reset the axes and move the model closer to the origin. There’s no need for it to be so far away.

You’ve got the model tilted at an odd angle which is also not helping you out.

There’s enough of a mess in your geometry that I would suggest starting over. Is your plan to 3D print this thing?

I’ll freely admit I’m no Sketchup expert! I’m just working my way through using no extensions and learning as I go.

My first pass was 3D printed successfully, but the curves had too many sharp bends. I corrected the bends, but am having trouble now filling in the side areas . The top surface is a dome and the top edge is a curve so nothing on this is a straight line or plane.

I’ll give your suggestions a try and see if that helps.

Thanks
Al

Work with your model centered on the origin and keep it horizontal. When I model for 3D printing I set units to meters and model as if millimeters are meters. That helps to avoid issues with small faces.

Thanks for the reply… I’ll give this some thought. I moved the model to the origin and realigned the axes and the problem went away.

Al