My Revit Add-on for Revit 2016 is crashing on the load with Revit 2017

[Anonymous]

My Revit Add-on for Revit 2016 is cras

hing on the load with

Revit 2017.  How to cure it ? 

[jeremytammik]

Debug it and see what is causing the crash.

Nobody else will be able to tell you without doing the same thing, stepping through the source code.

[Anonymous]

Thank you, Jeremy.

When I am doing

  application.RegisterDockablePane(_userDockablePaneId, _applicationName, Application._thisApp.GetMainWindow() as IDockablePaneProvider);

I am getting

Could not load type 'Autodesk.Revit.UI.Rectangle' from assembly 'RevitAPIUI, Version=17.0.0.0, Culture=neutral, PublicKeyToken=null'.

This call worked for Revit Architecture 2016.

[jeremytammik · Accepted solution]

Look at the documentation of the Rectangle class in the Revit API help file or online:

http://www.revitapidocs.com/2017/?query=Rectangle#searchModal

As you can see there, this class seems to have moved from the UI namespacein the Revit 2015 and 2016 APIs to DB in Revit 2017:

Cheers,

Jeremy