@julian, So upgrade to 0.6 completed successfully.
However, upgrade to 0.7 almost completed. At the tail end, it failed with this message:
21/7 23:40 [30598] - info: [2015/2/23] Activating NodeBB Essential Rewards
21/7 23:40 [30598] - info: [2015/02/24] Upgrading plugins:active to sorted set
21/7 23:40 [30598] - info: [2015/02/24] Upgrading plugins:active to sorted set done
21/7 23:40 [30598] - info: [2015/02/24] Upgrading privilege groups to system groups
21/7 23:40 [30598] - info: [2015/02/24] Upgrading privilege groups to system groups done
21/7 23:40 [30598] - info: [2015/02/25] Upgrading menu items to dynamic navigation system
21/7 23:40 [30598] - info: [2015/02/25] Upgrading menu items to dynamic navigation system done
21/7 23:40 [30598] - info: [2015/05/07] Upgrading uid mappings to sorted set
21/7 23:40 [30598] - info: [2015/05/07] Upgrading uid mappings to sorted set done
21/7 23:40 [30598] - info: [2015/05/08] Fixing emails
21/7 23:41 [30598] - error: undefined
Undefined error. Perhaps the contents of the log could shed some light:
at Array.forEach (native)
at Function.use (/var/forum/node_modules/express/lib/router/index.js:436:13)
at EventEmitter.<anonymous> (/var/forum/node_modules/express/lib/application.js:187:21)
at Array.forEach (native)
at EventEmitter.use (/var/forum/node_modules/express/lib/application.js:184:7)
at module.exports (/var/forum/src/routes/index.js:144:6)
at require.exec.cwd (/var/forum/src/webserver.js:63:3)
[cluster] Child Process (9241) has disconnected
[cluster] Child Process (9241) has exited (code: 8, signal: null)
[cluster] Spinning up another process...
Any clues?