This has driven me crazy for weeks and having tried nearly every fix I could find with no avail, I nearly gave up hope. If anyone is having trouble with thisthe solution is:

Copy the crystalreportviewers folder from:
C:\Program Files (x86)\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\Crystal Reports 2011

Copy to:
C:\inetpub\wwwroot\aspnet_client\system_web\4_0_30319

In your website's root web.config file create the following sections taking special note of the resourceURI value. Remove the ~ so that it reads "/crystalreportviewers". Removing the ~ enables reports to display and got rid of the "bobj is undefined" javascript error.

Restart your web in IIS.

Hope this helps somebody!

<configSections>
     

    <sectionGroup name="businessObjects">
      <sectionGroup name="crystalReports">
        <section name="rptBuildProvider" type="CrystalDecisions.Shared.RptBuildProviderHandler, CrystalDecisions.Shared, Version=13.0.2000.0, Culture=neutral, PublicKeyToken=692fbea5521e1304, Custom=null" />
        <section name="crystalReportViewer" type="System.Configuration.NameValueSectionHandler" />
      </sectionGroup>
    </sectionGroup>
 

 </configSections> 

<businessObjects>
    <crystalReports>
      <rptBuildProvider>
        <add embedRptInResource="true" />
      </rptBuildProvider>
      <crystalReportViewer>
        <add key="ResourceUri" value="../../crystalreportviewers13" />
      </crystalReportViewer>
    </crystalReports>
  </businessObjects>