APC Network Management Error: Somone is currently logged into the ACP Management Web Server

We received an alarm from one of our network managed APC UPS systems. When we went to log on we received the following notice:

Notice

Someone is currently logged into the APC Management Web Server.

Please try again later.

To “fix” this “problem” we need to log on via Telnet. If the Telnet Client is not installed then go ahead and install it since it is also a good tool for testing connections and SMTP issues.

1. Install Windows Features
   • 
2. Once complete close the window.
   • 
3. From there Start –> Telnet [Enter]
4. Open 192.168.99.99
5. Log on using the admin username and password
6. Exit
   • 

Refresh the browser window and attempt to log on again. It should be successful.

If not, a paperclip reset or serial connection to the network management would be the next step.

Philip Elder
Microsoft High Availability MVP
MPECS Inc.
Co-Author: SBS 2008 Blueprint Book