I finally got comserver working, with one second waits between opening the connection, sending the command and closing the connection. But I wonder if the best policy is not to close that communication at all, just keep it open at all times, or to close it after each event. Any thoughts? It may be a problem if one computer has to be rebooted, right? So there should be a check to see if the line is open. With list open connection from the demo, maybe?