Thank you for writing.
Despite my efforts, I was unable to reproduce such an exception on my end. In order to allow us to investigatethis case, please get back to us with a sample project where the issue can be reproduced.
Having in mind that the forums does not allow zip attachments and in order to avoid mixing different subject in one forum thread, I would kindly ask you to open a support ticket and provide your project there.
Thank you in advance for your time and cooperation.
the Telerik team