Hi Michal,
I am able to see the exception being thrown on pressing Ctrl-tab when there are no tabs.
We can resolve this issue by handling the Application.ThreadException.
Application.ThreadException += new System.Threading.ThreadExceptionEventHandler(Application_ThreadException);
static void Application_ThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
{
}
Please have a look at the attached sample and let me know if you need any further assistance.
Thanks for using Syncfusion products.
Best Regards,
Golda
cs50.zip