Error "HTTP Error 503. The service is unavailable."


When you connect to XIA Automation Server, you receive an error "HTTP Error 503. The service is unavailable."



  • Open IIS Manager and go to Application Pools


  • Select the XIAAutomation application pool, this is what runs the XIA Automation web application, right click and select Start


  • Open the XIA Automation web application in a browser to get the error again


  • Open Windows Event Viewer, if the following errors and warnings are present in the System event log, the cause is an incorrect user name or password.


  • In IIS Manager, go to Application Pools, Advanced Settings, Identity and reset the username and password.



  • Ensure that this account is a member of the IIS_IUSRS built in group