Rt2.0-to-dumpfile not creating any tickets

We are attempting to migrate from a RT 2.0.15 system to RT 3.2.1. Our
database has around 66,500 tickets in it. When I run:
./rt-2.0-to-dumpfile /home/bdaniels/RT2DUMP
it returns to a prompt without errors several hours later. My RT2DUMP
directory contains:

30130448 Sep 14 12:45 metadata
4096 Sep 14 09:17 tickets-0

and the tickets-0 directory is empty.

I assume the large number of tickets is running into issues somewhere? Is
there any way to have rt2-to-dumpfile work on smaller batches?