Some curves in elevation are missing

[Anonymous]

I have a problem with this 3d curve. When i'm in elevation view some parts in the edge are disapperaed.

Could anyone know how to make it into a complete curve?

Any suggestion would be my pleasure

Thank you

(Sorry for my bad english)

[bin]

I don’t think it’s wrong. If it’s a family, use symbolic line or region to cover that up. 

[barthbradley]

Make your Far Clip Offset deeper. 

...is the geometry slightly askew to the viewing plane?