Icon of newly created Sketch constraint stays visible

By Adam Nagy

When you create new constraints in a Sketch then the constraints' symbol will show in the UI. In previous releases it did not do that.

Also, it only seems to happen if nothing depends on the Sketch geometry (e.g. no Extrude) so that the document does not get updated automatically.

In Inventor 2015 a new application setting was introduced that could be responsible for this:

Application Options >> Sketch >> 2D Sketch >> Constraint Settings >> 

Settings... >> General >> Display constraints on creation 

The constraint icons only show until you update the document. So once you call Document.Update they will disappear.

Sub AddConstraint()
  Dim doc As PartDocument
  Set doc = ThisApplication.ActiveDocument
  
  ' The Skecth needs to be selected in the UI
  Dim sk As PlanarSketch
  Set sk = doc.SelectSet(1)
  
  sk.Edit
  
  Dim pc As ParallelConstraint
  Set pc = sk.GeometricConstraints.AddParallel( _
    sk.SketchLines(1), _
    sk.SketchLines(3))
    
  sk.ExitEdit
  
  ' This makes the constraint icons disappear
  doc.Update
End Sub