Arithmetic on a nil value?

[myrroddin]

I understand that I have an error telling me that GetLeft and GetTop are nil values, thus the math isn't working. What I do not understand is why self.resFrame (module.resFrame) doesn't exist at that point.

If it helps, I am trying to create a header frame on the top of self.resFrame which contains the text "SmartRes2". It should have a background and border, and a silver texture.

Full code: https://pastebin.com/Gu3GrDF4

Error from BugSack:

1x ...rfaceSmartRes2/Modules-Classic/Bars/Bars.lua:142: attempt to perform arithmetic on a nil value
[string "@SmartRes2/Modules-Classic/Bars/Bars.lua"]:142: in function `GetResFramePosition'
[string "@SmartRes2/Modules-Classic/Bars/BarsOptions.lua"]:21: in function `GetOptions'
[string "@SmartRes2/Modules-Classic/Bars/Bars.lua"]:66: in function <...rfaceSmartRes2/Modules-Classic/Bars/Bars.lua:58>
[string "=[C]"]: ?
[string "@SmartRes2/Libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:66: in function <SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:61>
[string "@SmartRes2/Libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:494: in function `InitializeAddon'
[string "@SmartRes2/Libs/AceAddon-3.0-13/AceAddon-3.0.lua"]:619: in function <SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:611>
 
Locals:
self = <table> {
 SetDefaultModuleLibraries = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:363
 Enable = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:290
 UnregisterAllEvents = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:164
 EnableModule = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:328
 modules = <table> {
 }
 GetModule = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:206
 IterateEmbeds = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:438
 UnregisterComm = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:143
 defaultModuleLibraries = <table> {
 }
 Deserialize = <function> defined @BugSack/Libs/AceSerializer-3.0/AceSerializer-3.0.lua:246
 UnregisterChatCommand = <function> defined @SmartRes2/Libs/AceConsole-3.0/AceConsole-3.0.lua:107
 Printf = <function> defined @SmartRes2/Libs/AceConsole-3.0/AceConsole-3.0.lua:65
 SetDefaultModulePrototype = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:405
 GetOptions = <function> defined @SmartRes2/Modules-Classic/Bars/BarsOptions.lua:16
 CreateResFrame = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:94
 name = "SmartRes2_Bars"
 IsEnabled = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:447
 orderedModules = <table> {
 }
 resFrame = SmartRes2_ResFrame {
 }
 DisableModule = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:346
 baseName = "SmartRes2"
 SendMessage = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:49
 RefreshConfig = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:86
 GetResFramePosition = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:139
 RegisterMessage = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:80
 UnregisterMessage = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:143
 Print = <function> defined @SmartRes2/Libs/AceConsole-3.0/AceConsole-3.0.lua:50
 OnDisable = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:78
 OnEnable = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:72
 OnInitialize = <function> defined @SmartRes2/Modules-Classic/Bars/Bars.lua:58
 lsm = <table> {
 }
 IsModule = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:213
 db = <table> {
 }
 SetDefaultModuleState = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:383
 SendCommMessage = <function> defined @BugSack/Libs/AceComm-3.0/AceComm-3.0.lua:83
 UnregisterAllComm = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:164
 SetEnabledState = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:420
 Serialize = <function> defined @BugSack/Libs/AceSerializer-3.0/AceSerializer-3.0.lua:122
 enabledState = true
 GetArgs = <function> defined @SmartRes2/Libs/AceConsole-3.0/AceConsole-3.0.lua:140
 RegisterEvent = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:80
 UnregisterAllMessages = <function> defined @BugSack/Libs/CallbackHandler-1.0/CallbackHandler-1.0.lua:164
 RegisterComm = <function> defined @BugSack/Libs/AceComm-3.0/AceComm-3.0.lua:56
 RegisterChatCommand = <function> defined @SmartRes2/Libs/AceConsole-3.0/AceConsole-3.0.lua:81
 defaultModuleState = true
 IterateModules = <function> defined @SmartRes2/Libs/AceAddon-3.0/AceAddon-3.0.lua:433
 Ne

[Dridzt]

1. Where (and more importantly when) do you SetPoint the resFrame?
2. After 15years how are you still getting people to write your addons for you?

[myrroddin]

Ah, thank you for the hint. I don't use SetPoint on f, but I do on self.resFrame via line 69. I'm guessing lines 121 and 131 aren't firing unless I SetPoint on f?

[Fizzlemizz]

See the comment under Returns

GetResFramePosition calls GetLeft on self.resFrame before it does a SetPoint on self.resFrame

[myrroddin]

Originally Posted by Fizzlemizz See the comment under Returns GetResFramePosition calls GetLeft on self.resFrame before it does a SetPoint on self.resFrame

D'oh! I missed the comment.

Returns Returns nil if the region has no points.

I added the below as line 110; that should fix the nil error. Now to load and test.

f:SetPoint(db.point, UIParent, db.point, db.x / db.scale, db.y / db.scale)

Thank you, good people.