var/list/colors = list("Blue","Red","Green")
client
var/color = ""
New()
..()
while(!color)
var/list/ctemp = new()
ctemp += colors
color = input(mob,"What color would you like to be?","Color") in ctemp
if(color in colors) colors -= color
else
alert(src,"Sorry, that color was selected by another player, choose another.","Oops","Ok")
color = null


The problem is that multiple people can be seeing and selecting from the same list. If someone chooses Green, Green will still show for all the other players as an option. I received the error (stated in the topic) so I changed to the above setup. Before I simply used the "colors" list and checked to make sure the item was still in the list afterwards.

I don't want to deal with "checking out" the list so only one player can choose at a time. This setup still seems to function well but I still get the error (which doesn't actually seem to effect anything).

Any clue as to why that error is still cropping up, I have a feeling it is something simple I am glancing over...