You may get the following error message if the Server Plugin stops running.
Error: Could not connect to the Server Plugin. No connection could be made.
To verify that the server plug in is running take a look at the bottom right hand side of iCommand.
This icon 
indicates the server is running.
This icon 
indicates the server is NOT running.
To restart the Alpine Sever Plugin follow these instructions on the server:
1). Right click on Windows Start menu and select Computer Management.
2). Click on Services and Applications and then select Services.
3). Look for Alpine Server Plug-in under the list of services.
4). Right click on Alpine Server Plug-in and select Start. When complete the Status should say Running. After restarting iCommand the Alpine Server Plugin should now show that it is running. 
Please reach out if any further assistance is required.
Helpdesk: 866.237.2878
Email Support: helpdesk@alpineitw.com