Crystal Report Viewer bobj is undefined

Web.config.

<configSections>

    <sectionGroup name="businessObjects">

      <sectionGroup name="crystalReports">

        <section name="crystalReportViewer" type="System.Configuration.NameValueSectionHandler" />

      </sectionGroup>

    </sectionGroup>

  </configSections>

  <businessObjects>

    <crystalReports>

      <crystalReportViewer>

        <add key="resourceURI" value="~/crystalreportviewers13" />

      </crystalReportViewer>

    </crystalReports>

  </businessObjects>

Following are the solutions :

1. Copy the folder "crystalreportviewers12" from “C:Inetpubwwwrootsystem_web2_0_50727" under “Default Website” to the “Custom Website” directory in IIS. Or, create a virtual directory pointing ‘aspnet_client’ folder in the custom web site directory.
2. In the IIS Manger, select the Application Pool and Basic Settings. Under Managed Pipeline Mode, change Integrated Mode to Classic Mode.
3. The value of resoureURI should be "~/crystalreportviewers12" not "/crystalreportviewers12".
4. Copy the CrystalReportViewers12 folder from
   "C:Program FilesBusiness ObjectsCommon4.0" and paste it to "C:WindowsMicrosoft.NETFrameworkv3.5ASP.NETClientFiles".

          Note: Framework may vary as per the Visual Studio version used.