Errors may appear when loading Sage 300 Web Screens login Window


The following errors or problems may appear when loading Sage 300 Web Screens login Window

“Error 500.19”

“Error 404”

“Page cannot be displayed”

The Sage 300 Web Screen page is blank.

HRESULT E_FAIL has been returned from a call to a COM component

Important: To use Sage 300 Web screens over an external network or the internet you must have security measures such as SSL or VPN in-place to protect your data. Consult your IT Professional or Business Partner to determine the security measures appropriate for your needs


Note: Sage 300 Web Screens are only supported on Windows Server 2012 R2 or higher.

If using Windows Server 2012 R2 or higher:

  1. Ensure Sage300ERP App Pool is started.
  2. Ensure Localhost is not running in Compatibility View in the web browser.
  3. Ensure the required IIS Roles components are installed. Please refer to KB 19741 for a list of required Roles components in IIS. Sage Portal and Sage 300 Web Screens share the same set of Roles components.
  4. Sage 300 cannot be installed with a UNC path or mapped drive for the Program directory or shared data directory when using web screens. Check the registry path. Reinstall using a local path for the programs folder. Note: If a UNC path or mapped drive was used, the Sage.CNA.WindowsService will not have installed. If the shared data path using a UNC path, the error HRESULT E_FAIL will appear when loading the web screens login page. Edit the path in the registry to use a local drive.


If necessary, seek the assistance of Acute Data Systems to help provide assistance with this process.