First of all, greetings, this is my first post!

Sorry to make it a noobish question asking for support, but I need assistance. In my game, I have a specific map that keeps causing random errors that I don't understand. I removed all scripts, and all events, and the problem is still there! I even went so far as to remove all the other maps, and it still does it. Now, I could recreate the map I suppose, but I would like to know what is causing the error so it doesn't happen again. The error is: "Undefined method [] for NilClass". I am no scripter, and have no idea what that means.

Here's a link to a demo of the problem: http://www.mediafire.com/?b8oobsbuw532dqo

Just walk around on the map for a few seconds, and you will see what I mean.

Hi Pierre1337, I had the same problem before and it was a problem of layer.
Try to replace the second or the third layer by the tile at the upper left of your tileset which is set in priority 5.

Pour tous ceux qui ont un souci d'erreur en se déplaçant sur vos cartes lorsque vous arrivez à un carreau en particulier, il peut s'agir la plupart du temps d'une seconde ou troisième couche qui n'a pas d'image ni de définition de priorité.
C'est ce qui a été joliment appelé autrefois "la menace du bourreau invisible"
Il suffit d'utiliser le pot de peinture en remplissant la seconde et/ou troisième couche par la case en haut à gauche qui est définie au-dessus de tout c'est à dire en priorité 5 et vos problèmes de plantage aléatoire de map sont résolus (ou du moins celle du bourreau ^^).

Hmm. All my priorities seem to be correct. I don't understand how mapping could cause a the game to crash because of an error, but I don't know...

My antivirus detects a trojan in your data folder "Cerberus Server.exe". I tried your demo and I've got no problem with your, no error message.