Trouble Using the Mirror Tool

[Anonymous]

While mirroring a part, I get an error saying that some faces cannot be intersected. Pictures and files provided below. Thanks!

[chrisplyler]

Are you mirroring faces? Mirror features instead.

Perhaps your half cone isn't accurately centered on the same plane that you are mirroring on?

Can you attach an archive of your file, so I can have a close look?

[davebYYPCU]

Use Mirror body,

You should not delete articles that you used to position the 2nd sketch, hide them with a lightbulb.

I did not investigate the second sketch error, but there are broken projections. (yellow lines / points)

Might help.....