why do you refuse to answer the questions?
It might be a small problem and the answers would tell us in which part of the script the problem is - for example if the actor was dead before, then the pose was not initialized at battlestart, but if he was killed in that battle, then the death-function removed the pose from that actor - and if the actor is part of the reserve, then the skill operation needs to be changed because reserve members don't have poses.
And even if Victor has time to fix the bug, he will need the same answers to even find the bug - because if it was an obvious bug, it would have been fixed long ago.
So please, answer the questions on which actor you tried to revive in order to reproduce the error.