There is an apparent bug in which you cannot Teach a tech to 'zero'
level, as reported in the rules. Using the zero quantity has caused
the referee's program to crash in previous games.
It has been recommended that you always specify the exact level you
wish to Teach.
I'm not sure (of course), if this was due to the FH program, or the
setup on the previous computers running the game, but it has
apparently happened in more than one game (or so I was informed in the
past).
Just thought you should know. Thanks for running FH!
Old Gamer