Looks like it's nota ble to bind to the port. Have you rebooted since this? Also, see if you are able to run as root, just to see if it works then.
Yep, have rebooted and transmission fails to start either automatically or manually. Tried running as root, it starts but when I try and download a torrent I get "Error: Unable to save resume file: Permission denied".
Mar 7 09:13:07 Media sudo: root : TTY=console ; PWD=/ ; USER=root ; COMMAND=/bin/bash -c . /usr/local/PhAzE-Common/Transmission/startcfg.sh; nohup /usr/local/Transmission/usr/bin/transmission-daemon -p 9091 -g /mnt/disk1/apps/transmission/config -T -x /var/run/Transmission/Transmission.pid > /dev/null 2>&1 &
Mar 7 09:13:08 Media transmission-daemon[24927]: Transmission 2.82 (14156) started (session.c:738)
Mar 7 09:13:08 Media transmission-daemon[24927]: RPC Server Adding address to whitelist: 127.0.0.1 (rpc-server.c:828)
Mar 7 09:13:08 Media transmission-daemon[24927]: RPC Server Serving RPC and Web requests on port 127.0.0.1:9091/transmission/ (rpc-server.c:1035)
Mar 7 09:13:08 Media transmission-daemon[24927]: Couldn't bind port 51413 on 0.0.0.0: Address already in use (Is another copy of Transmission already running?) (net.c:371)
Mar 7 09:13:08 Media transmission-daemon[24927]: UDP Couldn't bind IPv4 socket (tr-udp.c:263)
Mar 7 09:13:08 Media transmission-daemon[24927]: DHT Generating new id (tr-dht.c:310)
Mar 7 09:13:08 Media transmission-daemon[24927]: Using settings from "/mnt/disk1/apps/transmission/config" (daemon.c:526)
Mar 7 09:13:08 Media transmission-daemon[24927]: Saved "/mnt/disk1/apps/transmission/config/settings.json" (variant.c:1217)
Mar 7 09:13:08 Media transmission-daemon[24927]: Saved pidfile "/var/run/Transmission/Transmission.pid" (daemon.c:538)
Mar 7 09:13:08 Media transmission-daemon[24927]: Port Forwarding (NAT-PMP) initnatpmp succeeded (0) (natpmp.c:73)
Mar 7 09:13:08 Media transmission-daemon[24927]: Port Forwarding (NAT-PMP) sendpublicaddressrequest succeeded (2) (natpmp.c:73)
Mar 7 09:13:10 Media sudo: root : TTY=console ; PWD=/usr/local/emhttp ; USER=root ; COMMAND=/bin/bash -c . /usr/local/PhAzE-Common/Transmission/startcfg.sh; /usr/local/Transmission/usr/bin/transmission-daemon --version 2>&1
Mar 7 09:13:10 Media transmission-daemon[24927]: Port Forwarding (UPnP) Found Internet Gateway Device "http://192.168.0.1:1900/ctl/IPConn" (upnp.c:202)
Mar 7 09:13:10 Media transmission-daemon[24927]: Port Forwarding (UPnP) Local Address is "192.168.0.99" (upnp.c:204)
Mar 7 09:13:10 Media transmission-daemon[24927]: Port Forwarding (UPnP) Port forwarding through "http://192.168.0.1:1900/ctl/IPConn", service "urn:schemas-upnp-org:service:WANIPConnection:1". (local address: 192.168.0.99:51413) (upnp.c:279)
Mar 7 09:13:10 Media transmission-daemon[24927]: Port Forwarding (UPnP) Port forwarding successful! (upnp.c:282)
Mar 7 09:13:10 Media transmission-daemon[24927]: Port Forwarding State changed from "Not forwarded" to "Forwarded" (port-forwarding.c:95)
Mar 7 09:13:11 Media sudo: root : TTY=console ; PWD=/usr/local/emhttp ; USER=nobody ; COMMAND=/bin/bash -c . /usr/local/PhAzE-Common/Transmission/startcfg.sh; curl --version 2>&1