Internet Explorer cannot display the webpage" or "The page cannot be displayed" when browsing to the Powerlogic Scada Webclient.

When the user tries to access the webclient on the server he will get the following error:

Internet Explorer cannot display the webpage OR The page cannot be displayed There are no other errors in Windows event viewer.

Cause HTTP Keep-Alives are disabled in Internet Information Services (IIS) Resolution "Enable HTTP Keep-Alives" must to be checked in IIS For IIS6: 1. Open IIS. Start>Control Panel>Administrative Tools>Internet Information Services (IIS) Manager. 2. Expand Web Sites 3. Right-click on Default Web Site (Server operating systems only) 4. Select Properties 5. On the Web Site tab, check "Enable HTTP Keep-Alives" 6. Click Apply and OK 7. Rerun the webclient. For IIS7: 1. Start>Run, type INETMGR, press Enter 2. Click on the Web Site (Default Web Site in our case) 3. In the Features View, double click HTTP Response Headers 4. Click on Set Common Headers… in Actions panel OR Right click in the HTTP Response Headers Feature Page and click Set Common Headers… 5. Check the Enable HTTP Keep-Alive if it is not already enabled. 6. Click OK 7. Rerun the webclient.

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Legacy KB System (APS) Data: RESL210846 V2.0, Originally authored by RaDe on 03/02/2013, Last Edited by RaDe on 06/22/2013
Related ranges: PowerLogic SCADA 7.1, PowerSCADA Expert 7.2