Is there a work-around for "File size limit exceeded" errors when using db_dump185

Has anyone ever attempted to upgrade an old Berkeley database that must be dumped via db_dump185?

When I try to dump a database containing comments from a website, as follows:

$ bash-3.2$ db_dump185 -f comment.dump comment.db 

I get this error:

File size limit exceeded (core dumped)

Is there a way to avoid this?

Here is out output of ulimit -a:

$ulimit -a

core file size          (blocks, -c) 200000
data seg size           (kbytes, -d) 200000
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 32743
max locked memory       (kbytes, -l) 32
max memory size         (kbytes, -m) 200000
open files                      (-n) 100
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 8192
cpu time               (seconds, -t) unlimited
max user processes              (-u) 20
virtual memory          (kbytes, -v) 200000
file locks                      (-x) unlimited

And this is the database:

$ ls -l comment.db 
-rwxr-xr-x 1 daiello staff 184393728 Jan 12 2012 comment.db

I want to make sure that this question gets an answer. What @Alan suggested db_dump185 comment.db | cat > comment.dump really helped. Continuing with the dump eventually consumed all available real memory and most of the swap.

So we moved the database files to a bigger server and subsequently ran into the dreaded db_dump185: seq: invalid argument error. I don't believe db_dump185 has a repair function, but I haven't done all the research that I want to do yet.