Item does not exist. The page you selected contains an item that does not exist. It may have been deleted by another user.

I have created the Dataformwebpart and when click on the item then redirect to destination page.
I have passed the query string with "ID". So i found this error in the destination page.
This is the ComException related error occured because of the "ID" query string is confict with the sharpoint data.

Solution :
You can changed the query string with any character and after append ID string.
like ex. "EID".