Please don't double-post. Previous thread removed.
The limit is clearly shown in "Max address space" line. It's in different units, but if you divide 256800000 by 1024 you'll get exactly 250781.
ulimit values for transmission script torrent done
Re: ulimit values for transmission script torrent done
Check the /etc/security/limits.conf (or additional files in /etc/security/limits.d/) to see and adjust the global limits. The "item" (3rd column) will be "as" in your case. If there is no rule for transmission, you could add one; either refer to the comments in the file itself or to `man limits.conf` (if you have the manual pages installed).