When opening Published Application "A specific machine was not found. Please inform your system administrator." error pop-ups

Symptoms

When opening Published Application "A specific machine was not found. Please inform your system administrator." error pop-ups:

Cause

RAS RD Session Host Agent service is down or not accessible.

Resolution

1. Ensure that Terminal service is running:

   • Identify from which Terminal server the affected resource is published (in the left pane of Parallels Remote Application Server Console dialog go to Publishing tab > in the middle pane locate the published resource > in the right pane switch to Publish From).

     Note: if resource is published from several Terminal servers the further steps should be applied to all of them.

   • On the required server press Win+R, type services.msc in the Run dialog and hit Enter to open Services applet.

   • Locate RAS RD Session Host Agent service and make sure it's running. If not, right-click it > Start

2. Ensure that Terminal Server is accessible:

   • Check that Agent state is Verified: go to Parallels Remote Application Server Console > Farm > Terminal Servers > right-click the Terminal Server > Check Agent.

   If it's not:

   • Check the connection and firewall rules.
3. Restart the RAS RD Session Host Agent service.