Customization assembly could not be loaded error

If the customization assembly could not be found or could not be loaded error message displays when opening a template or workbook, data in the workbook can be reviewed but not changed.

There are several possible causes for this error:

  • The CBRWorkbook virtual directory security is set to use the Basic authentication method in Internet Information Services. It should be set to either Anonymous or Integrated.
  • The .NET Framework security was not set to establish trust between the client computer and the web server. This security is set automatically for the web server specified during installation. If the application uses multiple servers, .NET security must be set for each web server that runs the Decision web components.
  • The workbook is stored on a shared drive or mapped drive, and .NET Framework security was not set for that shared or mapped drive. To avoid this error, either store the workbook on the client computer instead or set the .NET security to establish full trust between the client computer and the shared or mapped drive.
  • The web server is not set up as a trusted site in Microsoft Internet Explorer. To resolve this issue, open Internet Explorer, click Tools > Internet Options, select the Security tab, click on Trusted sites as the web content zone, click on the Sites button, specify the URL for the web server, click Add, and click OK.
  • The user attempted to open the workbook directly from email. To avoid this error, first save the template to a directory and then open it.
  • The user attempted to open the workbook when the LAN cable was disconnected from the computer. As a workaround, store the workbook in the \ComshareWeb\CBRWorkbook\CBRWorkbook default directory.
  • The browser uses a proxy server. As a workaround, you can set the web server, where the Excel Services cell-based component is installed, to bypass the proxy server by following these steps: In Internet Explorer, open Tools > Internet Options, select the Connections tab, click LAN Settings, click Advanced in the Proxy Server group box, specify the web server name in the Exceptions text box, and click OK.
  • The template was not configured properly during the Decision installation. To check, open the Server Editor Explorer. If the Codebase Path and CBR Service URL text boxes are empty, the workbook was not configured. This may be caused by having non-cell-based workbooks in the Templates directory. You can resolve this using these options:
    • Remove non-cell-based workbooks from the Templates directory and reinstall Decision.
    • Use Server Editor Explorer to manually configure the workbook.