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


Issue

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



Cause

 

  • 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.



Solution


  • 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