Features tied by vertice association?

[fireflyo9]

In Civil 2012 it seems that a new feature has been added where at times I will say draw a line (#1) that snaps to a vertice on another line(#2) (could be new, could be existing)  then I will go to adjust the location of the line (#1), move a vertice, use the move command to drag it somewhere or something and it carries the shared vertice of line #2 with it even though line #2 is not selected.

Where do I turn this setting off?  Why does it seem to occur at random?  How do I make this feature occur when I actually want it to occur?

Any help is appreciated!

[Alfred.NESWADBA]

Hi,

look to constraints (>>>details<<<), it seems like you have activated CONSTRAINTINFER

Disable CONSTRAINTINFER (>>>details<<<) and delete the existing constraints using command _DELCONSTRAINT.

- alfred -

[MarySeufert]

If Alfred's suggestion isn't the issue, are you referring to Civil 3D Feature Lines?

[fireflyo9]

Thank you Alfred for the tips & help documentation.  That's exactly what was going on!  It's been driving me nuts for months!  I'm stillnot entirely sure why it appears to occur at random, but at least now I know I don't have to keep exploding my linework all the time!

Mary - I frequently use feature lines in grading plans and as far as I know there is no way to avoid them constraining/associating with eachother if they cross (with or without snapping vertices)  Do you happen know of a way to keep lines that appear to intersect in 2D (but not actullly intended to intersect in 3D) from being tied together?

Thank you!

[MarySeufert]

To have intersecting feature lines at different elevations at the Point of Intersection, the Feature Lines have to be associated to two different Sites. All feature lines within a site will vertically intersect one another. For a real world example, I make a unique site for each phase of grading (excavation, compaction, finished, etc.), then associate (or if already created, move) the appropriate feature lines to their respective sites.