I have a 2D sketch which has straight lines and splines - those
entities are together supposed to form a closed shape, but I suspect
there are gaps between the ends of the entities. When I attempt to
extrude the sketch, I get "sketch has more than one open contour",
which I suspect is because there are gaps in the sketch.
I can't figure out how to merge or join the individual entities into
one closed shape, and/or to eliminate the error in extruding. (I
to close the gaps the splines would have to adjust some).
Note I tried to use "repair sketch", but it didn't seem to do
OK, I tried that. Feature usage is "base extrude", Contour
type is "multiple disjoint closed", and the resulting message is
"sketch has more than one open contour". I'm assuming the
problem is "gaps", but I don't really know what the error
message means .....
The error message means you have at least 2 sketch entities that are not
joined together so you can't create an extrusion.
In order for you to create an extrusion from a sketch, it has to be
fully closed with no gaps between the sketch entities. You will have to
determine where the gaps are and close them by either creating new
entities to fill the gaps or extend existing entities so that they join
together in one continuous sketch. You can create a thin extrusion from
one continuous sketch that is not a closed loop type sketch as long as
there is only one continuous sketch without any gaps between the
Duplicates can also cause the failure, as can very tiny objects, or
accidental ones outside the normal viewing area.
Sometimes I draw a circle around suspected intersection problems and
Extend those lines and then Trim to revalidate the intersection.
As Bo mentioned, duplicate lines are sometimes inadvertently created using
the symmetric tool. Other areas to look at are end points that are at the
intersection of more than entity are sometimes coincident with the
construction circle or construction line rather than the desired entity.