One thing i forgot to mention, i am using Caliburn Micro. In the meantime i have done some further Investigation.
My app uses the Caliburn Micros bootstrapper for starting a ShellWindow where the GroupBar is sitting in. If i start the app without the bootstrapper then everthing works as expected. It seems that Caliburn Micro and Syncfusion WPF controls doesn't work together in my scenario !?
MMMuthalagu M Syncfusion Team November 27, 2013 11:33 AM UTC
Thanks for using Syncfusion Products.
We are not able to reproduce the reported System.IO.FileNotFoundException issue with our GroupBar and Caliburn Bootstrapper class and here we have attached our working sample.
Could you please update more information of issue such as issue reproducing sample to us? It would be better for us to analyse further and provide you a better solution.