Hi, I'm using a DockPane.
When I use AddInManager to run my new modified dll, Debug.Trace are not visible in your Trace Events window...
Maybe the problem comes from the DockablePaneId with Guid....
Maybe you can reproduce the pb with this exemple :
https://thebuildingcoder.typepad.com/blog/2013/05/a-simpler-dockable-panel-sample.html
Cheers