Warning when i try to enter to my forum

[Alucard^]

Well, this is really annoying... today i entered to the forum without any problem, and now... i get this error:

Warning: require_once([path]/includes/class_hook.php) [function.require-once]: failed to open stream: Too many open files in [path]/includes/init.php on line 275

Fatal error: require_once() [function.require]: Failed opening required '/www/docs/nv-arg.com.ar/public_html/foro/includes/class_hook.php' (include_path='.:/usr/local/lib/php') in /www/docs/nv-arg.com.ar/public_html/foro/includes/init.php on line 275

:/

Is a problem of the forum or hosting?

I really don't know what i can do... i tried disabling all plugins in config.php without any result.

[snakes1100]

It's a OS issue and most likely the host has set a limit to small for a multi site server or did it on purpose, if you have shell access run this command and paste the results.

ulimit -aH

[Alucard^]

Well, the problem fixed alone. Thx for your answer.