i'm sorry this link not help
i just start new web application with sample MS report .rdlc
and try to register it in UltiDev v2.0.20
and i get the same error in printing
I NEED YOU JUST TO TRY TO MAKE IT (TO SEE IF YOU HAVE THE SAME ERROR IN PRINTING) TO FIX IT IN NEW VERSIONS
NOTE: MY ATTACHED WEB.CONFIG FILE HAVE THE HttpHandler IN system.web SECTION (THIS HttpHandler ADDED AUTOMATICALLY WHEN ADD MS REPORT VIEWER TO ANY PROJECT)
hossamnew attached the following image(s):