Runtime Error: Cannot read from List...what?

ID:140002
 
Jun 20 2010, 9:23 am
Code:
world/proc
    Update_Save(k,list/S)
        var/list/strg = S[3]
        for(var/i = 1, i <= strg.len, ++i)
            strg[i] = Escape_String(strg[i])

        var/i = SendInterserverMessage("update_save", list("inv" = S[1],"bar" = S[2],"strg" = S[3],"nums" = S[4],"lst" = S[5], "key" = k))
        sleep(100)
        var/e = 0
        while(i && e < 5)
            e++
            i = SendInterserverMessage("update_save", list("inv" = S[1],"bar" = S[2],"strg" = S[3],"nums" = S[4],"lst" = S[5], "key" = k))
            sleep(100)
        if(!i)
            world.log << "Update_Save([k]) failed."


Problem description:

Everytime I try to save, I get this specific error of sorts.

runtime error: cannot read from list
proc name: Update Save (/world/proc/Update_Save)
source file: 0SpawnServer.dm,415
usr: the capacity (/mob/human/player)
src:
call stack:
: Update Save(the capacity (/mob/human/player), null)
the capacity (/mob/human/player): Save Character(the capacity (/mob/human/player))
Update_Save(xorbah) failed.

It fails, no matter what I try to do to fix it. This was the original piece to start with. Can anyone help?
Edit: var/list/strg = S[3] is the stated problem.
Jun 20 2010, 9:35 am
You are not passing a list to the procedure. Hence, this line of the runtime error:

Update Save(the capacity (/mob/human/player), null)
Jun 20 2010, 9:38 am
In response to Garthor
Okay, well, the saves are going to a MYSQL server. How would I pass the list? Is there a reference somewhere?
Jun 20 2010, 10:21 am
In response to Xorbah
No. When you are calling the proc, you are supposed to provide two arguments, with the second one being a list. You are either passing only one argument, or passing one argument and null.
Jun 20 2010, 10:37 am
In response to Garthor
So, var/i = SendInterserverMessage("update_save", list("inv" = S[1],"bar" = S[2],"strg" = S[3],"nums" = S[4],"lst" = S[5], "key" = k)) is the only arguement in this case?
Jun 20 2010, 10:48 am
In response to Xorbah
I fixed it, but now that I put the other argument in, and put libmysql.dll in my System32 folder, It comes up with this...odd error, and shuts off the server 5 seconds afterwards.
Database Connection error: The operation completed successfully.

Any help, anyone?
Jun 20 2010, 11:06 am
In response to Xorbah
Nevermind, fixed it, but it's saying that it cannot read from the list, AGAIN.
Jun 20 2010, 12:08 pm
In response to Xorbah
I'd really appreciate the help, guys...It says it cannot read from the list. And I cannot understand what Garthor is saying, really.
Jun 20 2010, 5:40 pm
In response to Xorbah
You are calling UpdateSave(some_players_key) or UpdateSave(some_players_key, null). Neither of these are valid, because it needs TWO arguments. The second argument should be a list.

The error is where you are CALLING the proc, not in the proc itself (unless there's an error in the proc itself, of course).