Arrows

ID:263122
 
Jun 4 2006, 10:00 am
Code:
obj
    Arrow
        layer = MOB_LAYER+3948293481235161758194918541534713514955553959535769532349
        icon = 'Objects.dmi'
        Arrow_Up
            name = ""
            icon_state = "ArrowUp"
            MouseEntered(src)
                icon_state = "ArrowUpMove"
            MouseExited(src)
                icon_state = "ArrowUp"
            Click()
                var/obj/Arrow/Arrow_Up/AU
                if(AU.screen_loc == "9,10:27")
                    usr.Str ++
                    usr.Def --
                    usr.Speed --
                    for(var/obj/text/T in usr.client.screen)
                        del T
                        usr.textonscreenTEXT(2,0,11,0,"Strength")
                        usr.textonscreenTEXT(10,0,11,0,"[usr.Str]")
                        usr.textonscreenTEXT(2,0,10,0,"Defense")
                        usr.textonscreenTEXT(10,0,10,0,"[usr.Def]")
                        usr.textonscreenTEXT(2,0,9,0,"Speed")
                        usr.textonscreenTEXT(10,0,9,0,"[usr.Speed]")
                        usr.textonscreenTEXT(2,0,8,0,"Luck")
                        usr.textonscreenTEXT(10,0,8,0,"[usr.Luck]")
                        usr.textonscreenTEXT(2,0,7,0,"Mind")
                        usr.textonscreenTEXT(10,0,7,0,"[usr.Mind]")
                        usr.textonscreenTEXT(2,0,6,0,"Skill Points")
                        usr.textonscreenTEXT(10,0,6,0,"[usr.SkillPoints]")


Problem description:

runtime error: Cannot read null.screen_loc
proc name: Click (/obj/Arrow/Arrow_Up/Click)
usr: FDAS (/mob/C)
src: (/obj/Arrow/Arrow_Up)
call stack:
(/obj/Arrow/Arrow_Up): Click(the turf (9,10,2) (/turf))
Jun 4 2006, 10:02 am
You never set AU to anything, therefore AU is null. You cannot access a null object's variables, since it doesn't exist.

~~> Unknown Person
Jun 4 2006, 10:49 am (Edited on Jun 4 2006, 11:58 am)
In response to Unknown Person
Yeah, i figured that out soon after starting this thread by switching AU to src and deleting the variable. Now it works fine. But if I click the arrow more than once, it produces this error over and over again, until it has to supress the proc crash.

runtime error: Cannot execute null.New().
proc name: textonscreenTEXT (/mob/proc/textonscreenTEXT)

**FIXED**