If you just compile and run, everything’s fine. You have to edit the template in blend to get the error message.
Just put it in a dictionnaryResource and then right click to edit the template in the Blend resources browser.
Can you do that ?
I’m using Blend 4 + Sketchflow RC (build 4.0.20421.0)
The message is :
InvalidOperationException : ERROR : SelectionAdorned : must set this attached property only on the VisulaElement of a Part: System.Windows.Controls.TextBlock
I agree with segfault. Really VERY annoying as the visual design for complex nodes is one the main reasons why i decided to use one of the rare WPF diagramming tools.
Thanx for letting us know if u can at least reproduce the issue.