Failing to append to list?

ID:139254
 
Apr 10 2011, 5:18 am
Code:
mob
    Read(var/savefile/F)
        ..()
        var/x
        var/y
        var/z
        F["x"] >> x
        F["y"] >> y
        F["z"] >> z
        loc = locate(x,y,z)


Seeing as I have little experience with clients, I added the following piece of code to both the Del() procs.

client
    Del()
        for(var/mob/Digimon/D in world)
            if(D.owner == src.mob)
                D.Move(src.mob)
        ..()
        src.mob.SaveC()

mob
    Del()
        for(var/mob/Digimon/D in world)
            if(D.owner == src)
                D.Move(src)
        ..()
        world<<output("<font color=green>{DXW}</font>[src] has logged out.","chat:add")


Problem description:

runtime error: cannot append to list
proc name: Read (/mob/Read)
usr: Q Reborn (/mob)
src: Q Reborn (/mob)
call stack:
Q Reborn (/mob): Read(players/Shaoni.sav (/savefile))
Shoutmon X2 (/mob/Digimon/Shoutmon_X2): Read(players/Shaoni.sav (/savefile))
Q Reborn (/mob): Read(players/Shaoni.sav (/savefile))
Q Reborn (/mob): LoadC()
Q Reborn (/mob): Login()

It doesn't seem to have any effect on gameplay what-so-ever, but it gets really annoying when this pops up everytime I load. Any ideas?
Apr 10 2011, 5:59 am (Edited on Apr 10 2011, 6:05 am)
Anything after either of those ..()s in the client and mob/Del() parts won't be done because ..() makes it do the parent procedure.
Apr 10 2011, 6:35 am
In response to LordAndrew
Well, that's odd, because it works perfectly. The runtime error appears even though there's no error o.o