Symptoms

An error has occurred trying to load the settings for the report. N/A:Could not load file or assembly 'Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
 

Diagnoses

An error has occurred trying to load the settings for the report. N/A:Could not load file or assembly 'Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
 

Resolution

Usually this error occurs because the Microsoft Report Viewer Redistributable (v. 2005 SP1/2008/2008 SP1) prerequisite indicated in the documentation (http://help.k2.com/onlinehelp/k2blackpearl/userguide/1420/webframe.html) has not been installed on all SharePoint servers.

Please ensure that this has been installed on ALL SharePoint servers.