I was playing the 1792 scenario (which is a blast--thanks Yearworld), and ran into a problem. I don't think it's specific to the scenario, but it's a militia-related problem, and France starts that scenario with lots of militia, so that's probably why I haven't seen it before.
French army engages Prussian army, chooses outflank. I had left the militia as the pinning force, forgetting that I couldn't take those casualties past a morale loss of 2.0. When my outflanking force failed to arrive, I was not broken, but couldn't take the militia casualties, so I had to take them out of cavalry from those corps (ouch!).
So far, fine. My stupidity. However, when I ran out of cav factors, I still couldn't take militia, and the infantry in the outflanking force wasn't available since it hadn't arrived, so the game was just stuck and I had to crash the program.
I don't see this situation actually covered in the rules, so I'm not sure what's supposed to happen. (Maybe I missed it.) But either:
1) Militia factors can be taken because that's all that's left in the pinning force.
2) Infantry factors can be taken from the outflanking force even though it hasn't arrived and the side isn't broken. (This alternative makes the least sense to me.)
3) Pinning force is considered to have broken, so outflanking force becomes available for casualties.
Any of those (even #2) would be preferable to having to exit the game in the middle of a battle, which, had it been ftf, would probably have created some acrimony.