Unable to Delete Curve from Sketch 1

[kadego]

Hi All
I am trying to update a sketch which is parent to an extruded feature. (The extrusion was subtracted from the solid body at its creation).
However when I try to delete curves or lines in the sketch it gives me an error message as follows.

"The selected objects are not supported by this operation"

I have tried creating a new sketch and hence extrusion and then replacing the existing to no avail.
I have also re-attached the sketch to another plane.
I can delete the extrusion but I also lose a lot of stuff further down the tree.

I am sure there is a simple solution however being a UG newbie I don't know which way to go.
TIA Dave

 

[Xwheelguy]

You need to add/remove curves of the sketch to the defining string of the extrusion. There should be an icon within the extrusion's sketch to do this.

Tim Flater
Senior Designer
Enkei America, Inc.

http://www.enkei.com