timereverywhere; was used in classic mode to say that the npc timeout events should be executed on all clients, not just the first person in the level. That function doesn't do anything anymore.
For disabling the error message, see
http://wiki.graal.net/index.php/Serv...errors_to_file
Errors like missing function calls are reported so that you can fix the scripts (the function call might have a purpose after all)