Experienced the same issue. I’ve
tried and failed on the following:
1. 1) Removed the .suo and
Removed the .resx
(and unable to rebuild)
Removed the Telerik
references (.reporting, .reportviewer.webform, & .web.ui) and reloaded the
4. 4) Opened up the
project -> Telerik -> Reporting -> Upgrade Wizard -> etc… ->
I succeeded in finding a
solution and fixed the issue with this (with the original build undergone none
of the above):
Open up the project
-> Telerik -> Reporting -> Upgrade Wizard -> etc… -> Ignore.
If your Visual Studio doesn't have telerik and the your project you are working on has a Telerik report, when you try to bring up the report designer, you get the error. I'd venture to guess between Telerik upgrade/downgrade you might get the same error.
Hope this helps.