Drafts not working in some cases

[Anonymous]

I'm trying to create some 20º Drafts in some basic bodies, but for some reason I'm getting errors in some of them and I cannot figure why...

I'm also ataching the file from the screencast in case anyone else wants to try it.

[jeff_strater · Accepted solution]

The problem are the "arcs" in that sketch.  This looks like it was imported from somewhere else.  If I delete those arcs and replace them with tangent circular arcs:

Then, I can draft this at 20 degrees (design attached):

It's likely that the original curves were "nearly tangent" to the edges, and this can cause modeling kernel problems

[Anonymous]

@jeff_strater You are right those are the culprits! This was a design I downloaded from internet & imported in SVG. Just tried your solution and indeed it works!