AutoCAD Civil 3D

[#1]

I have a closed polyline, I add it as a boundary , I delete it, I rebuild the surface (because I have the warning icon).

Ok, the boundary line does not exist...  and I have the "standard" limits.

What is for this option ????

Any help would be appreciated.

Thanks

[#2 · Accepted solution]

Do you set that option to Yes and Rebuild prior to deleting the boundary? The Surface should not be marked out of date when that is set to Yes and an object is deleted.

VIDEO showing the process.

[#3]

copied from the help file....

Insert contour data into the drawing as AutoCAD polylines using the Insert to Drawing command.

In some situations, the surface keeps breakline or contour data (a list of their point coordinates), but does not associate them with an object. This may happen, for example, when you deleted an entity that the surface depends on, but the Copy Deleted Dependent Objects option on the Definition Tab (Surface Properties Dialog Box) page of the Surface Properties dialog box is set to Yes. In this case, the surface simply converts its reference from a drawing entity to a list of points defining the object’s geometry.

To restore the reference to the object entity, you can insert the data associated with the deleted contour.

cheers!

[#4]

Ok, you have to mark the option before -

Thanks