This is MySql's issue not BMF's, in this case after loading required data for C_order_line and then BMF will create required indexes on table, so the size of c_order_line might large than 1.51GB. and data will be added into c_order_line during tpc-c mix testing, that may cause run out of mysql's limit. The best way is to give MySQL more temp space.
http://www.pythian.com/blog/mysql-troubleshooting-for-the-obsessive-oracle-dba/
