Can't see new SketchPlane

[Anonymous]

Hello everyone! Trying to create a new SketchPlane with this code

            using (Transaction tx = new Transaction(doc)) {
                tx.Start("Start");

                View activeView = uidoc.ActiveGraphicalView;

                SketchPlane sketch = activeView.SketchPlane;
                XYZ direction = activeView.ViewDirection;
                XYZ origin = activeView.Origin;
                Plane plane = Plane.CreateByNormalAndOrigin(activeView.ViewDirection, activeView.Origin);
                sketch = SketchPlane.Create(uidoc.Document, plane);
                activeView.ShowActiveWorkPlane();
                tx.Commit();
            
            }

But I don't see anything in one of projects in revit, but expect that I see something like this blue square on background. 

So what I do wrong that in one project I can see  new SketchPlane but in another can't?

Thank you!

[jeremytammik]

Please explore your model in detail before and after creating your sketch plane using RevitLookup and other database exploration tools:

https://thebuildingcoder.typepad.com/blog/2017/01/virtues-of-reproduction-research-mep-settings-onto...

Then you will see more of what is going on.

You should also make a note of the newly created sketch plane's element id so that you can examine the new element in more detail.