This article describes how to deploy Windows Forms Application that use Telerik Reporting.
During the installation of Telerik Reporting on your machine, the Telerik assemblies were added to GAC. When deploying a Windows Forms Application project the assemblies from the GAC are not copied automatically so you need to make sure the assemblies physically exist in the bin folder of your application:
These assemblies add up to the core reporting functionality and should be used only if you need the specific feature. They are responsible for additional support formats, database session or retrieving data from an OLAP cube.
XPS rendering extension requires Telerik.Reporting.XpsRendering assembly (Telerik.Reporting.XpsRendering.dll)
Database Session State Provider requires Telerik.Reporting.Cache.Database.dll and Telerik Data Access