Someone is currently logged into the APC Management Web Server
Resolution When logging on to an APC management web GUI you may be faced with the error "Someone is currently logged into the APC Management Web Server". This can be resolved using one of two methods below. Add logout.html to the end of the URL, so for example http://10.10.10.10/logout.html Telnet to the APC IP and simply logout from there. The first option I have found to be hit and miss but the telnet option works every time. Once you have logged out from telnet you should then be able to login to the web GUI again.