Is my sketch broken?

[überfuzz]

I have a sketch with some splines that I suspect is faulty (when I try to use it my drawing breaks). The file I attaches is like the 3d try on this shape. Help would be highly appreciated...

[TheMarkster]

Looks okay to me. What are you trying to do that fails?

[überfuzz]

I try to put a chamfer on the rounded edges...

[papyblaise]

you do your Pad in PartWb, I suspect you are trying to do the fillet in Part design:?:
by doing a sketch with splines you have a 99.99% chance (risk) of crash

[überfuzz]

maybe not 99%... I tried maybe 10 times before it worked.

[chrisb]

Make the splines really tangent. It is a known issue that chamfers and fillets tend to fail on nearly tangent edges.

[chrisb]

Looked at your sketch: It is not recommended to repeat dimensions if you can use geometric constraints instead.

[chrisb]

I tried with tangent B-splines, but chamfer doesn't work either. You may try inserting short straight segments or arcs between the splines. And modeling only one quarter and then mirroring twice could make changes easier.

[Willem]

With ellipses and arcs the work can be done and than there is no problem with chamfer

[chrisb]

Here is a double mirror example.