Design Time Problems. 'The type or namespace name "Telerik" could not be found (are you missing a using directive or an assembly reference?)' Error on build.

Environment

Product

Progress® Telerik® Reporting

Description

'The type or namespace name 'Telerik' could not be found (are you missing a using directive or an assembly reference?)' Error on build.

Solution

Double-check if the project has references to Telerik Reporting assemblies, and if the references CopyLocal is set to true in the Visual Studio Property grid. In case you recently updated your Telerik Reporting installation, run the Upgrade Wizard in all related projects in Visual Studio.

If Telerik Reporting assemblies are referenced and updated, verify that the project targets .NET4+ framework Full Profile version.