Dear Nagaraj,
Thank you kindly for your response.
Regarding point 2. -
I have put together a small test project to demonstrate the issue. There is a little problem however: in our project we use some controls from Component Art. I was not able to recreate the client side error with normal ASP controls. The problem is that our whole project uses the CA tab strip together with a Multipage control to structure the application and it is the CA Multipage which causes the issue (In the attached project, if the placeholder control in Default.aspx is moved outside of the Multipage control, the error does not occur). We did some tests with an earlier version of Syncfusion (version 5.1) in the same environment and with this version the error did not occur. Any suggestions would be most welcome.
Kind regards,
Monica
DiagramWebApplication_3629a1a4.zip