Hi there. Don't worry about the double upload, that happens to most of us on occasion. When you upload a file with the same name of one you just have, it overwrites the first one so there are no duplicate copies.

May I ask which world you are working with? ErrorTrap is reporting it as "undefined." If there are any sims in it at all to begin with, perhaps try going into Create a Household (CAH) after the world has finished loading up rather than in the very beginning of a game session before the game clock even begins to move?