Battle error: battle won't begin nor show battle char

I just added two new characters to the main list and they won't show in the main map nor appear in the battle. Every time I try to start a battle it fades into the battle and a split second after it does, it fades back out to the main map. I've wired it so that the main character is removed and the new character is added so that a battle can commence without the main character. After the battle is done, it should fade out and into the main map where the new character is removed and the main character is added back in.it does return the way it's supposed to, but it's as if the battle never even happened. What should I do?

P.S. I was considering deleting the database configuration file and redoing it like I did before, but that will take forever to reprogram it.

Sciencekid