Can I make a unit training sequence to 0 times and create large armies in one city in one turn? (like retraining.)

Like this:
*stat_cost 1, 330, 110, 40, 50, 330*

to
*stat_cost 0, 330, 110, 40, 50, 330*

I tried before but it's CTD right after the Activision page.

Help please