NullReferenceException in WPF report viewer after invoking search dialog
|Progress® Telerik® Reporting
Invoking the search dialog in WPF report viewer results in NullReferenceException.
XAML template of WPF report viewer (Telerik.ReportViewer.Wpf.xaml) is missing the elements required by the search functionality that was introduced in version 12.1 18.516. This can happen if the template was not updated after upgrading the project to the version 12.1 18.516.
Viewer's template needs to be updated manually with the one provided with version 12.1 18.516. It can be found in [Telerik Reporting installation folder]\Progress\Telerik Reporting R2 2018\Wpf\Themes\[ThemeName] folder.
Custom templates need to be merged manually.