memory use problem

[Harry King]

Hello.

When making a big LM, I gotta an error message of 
"assertion "body != 0" failed: file
"/home/model/srilm/include/SArray.cc", line 300 ".

I used "OPTION=_c" when making world and used make-big-lm scripts to
train the LM.
And the machine has a P4 2.4G CPU and 1G memory, the OS is FreeBSD
4.10. When getting the error message above, the memory used is a
little more than 512M.

What can I do to save the memory use? How big LM can I make?
Thanks.