What steps will reproduce the problem?

Having Bigwigs and Kibs item level (continued) enabled at the same time.

What version of BigWigs are you using? (Stating 'latest' is not useful)

68 (52c9f6f)

Do you have an error log of what happened?

Swatter:
pg.1
Date: 2017-08-12 00:20:22
ID: 4
Error occured in: Global
Count: 1
Message: ..\AddOns\BigWigs_Options\Options.lua line 207:
attempt to call method 'SetDefaultSize' (a nil value)
Debug:
BigWigs_Options\Options.lua:207:
BigWigs_Options\Options.lua:199
[C]: LoadAddOn()
BigWigs\Loader.lua:288:
BigWigs\Loader.lua:276
BigWigs\Loader.lua:325:
BigWigs\Loader.lua:319
BigWigs\Loader.lua:1380: OnClick()
...ddOns\AtlasLoot\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:116:
...ddOns\AtlasLoot\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:116
Locals:
_ = {
0 =
}
_ = "ADDON_LOADED"
addon = "BigWigs_Options"
(*temporary) = nil
(*temporary) =

{
Status = {
}
OpenFrames = {
}
frame = {
}
}
(*temporary) = "BigWigs"
(*temporary) = 858
(*temporary) = 660
(*temporary) = "attempt to call method 'SetDefaultSize' (a nil value)"
addonName = "BigWigs_Options"
acOptions = {
type = "group"
name = "BigWigs"
set = defined @interface\AddOns\BigWigs_Options\Options.lua:44
args = {
}
get = defined @interface\AddOns\BigWigs_Options\Options.lua:41
}
BigWigs = {
SetDefaultModuleLibraries = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:398
RegisterEnableMob = defined @interface\AddOns\BigWigs_Core\Core.lua:194
Enable = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:325
NewModule = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:266
EnableModule = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:363
modules = {
}
CancelTimer = defined @interface\AddOns\NPCScan\Libs\AceTimer-3.0\AceTimer-3.0.lua:145
IterateEmbeds = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:473
RegisterBossModule = defined @interface\AddOns\BigWigs_Core\Core.lua:551
defaultModuleLibraries = {
}
TimeLeft = defined @interface\AddOns\NPCScan\Libs\AceTimer-3.0\AceTimer-3.0.lua:170
GetEnableMobs = defined @interface\AddOns\BigWigs_Core\Core.lua:195
NewBoss = defined @interface\AddOns\BigWigs_Core\Core.lua:443
ScheduleRepeatingTimer = defined @interface\AddOns\NPCScan\Libs\AceTimer-3.0\AceTimer-3.0.lua:127
CancelAllTimers = defined @interface\AddOns\NPCScan\Libs\AceTimer-3.0\AceTimer-3.0.lua:158
NewBossLocale = defined @interface\AddOns\BigWigs_Core\Core.lua:402
baseName = "BigWigs_Core"
SetDefaultModulePrototype = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:440
GetOptions = defined @interface\AddOns\BigWigs_Core\Constants.lua:80
C = {
}
GetBossOptionDetails = defined @interface\AddOns\BigWigs_Core\Constants.lua:121
name = "BigWigs"
GetRoleOptions = defined @interface\AddOns\BigWigs_Core\Constants.lua:84
IsEnabled = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:482
orderedModules = {
}
ScheduleTimer = defined @interface\AddOns\NPCScan\Libs\AceTimer-3.0\AceTimer-3.0.lua:92
DisableModule = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:381
GetOptionDetails = defined @interface\AddOns\BigWigs_Core\Constants.lua:76
NewPlugin = defined @interface\AddOns\BigWigs_Core\Core.lua:446
ADDON_LOADED = defined @interface\AddOns\BigWigs_Core\Core.lua:277
SendMessage = defined @interface\AddOns\BigWigs\Loader.lua:840
RegisterBossOption = defined @interface\AddOns\BigWigs_Core\Core.lua:380
GetPlugin = defined @interface\AddOns\BigWigs_Core\Core.lua:454
Print = defined @interface\AddOns\BigWigs_Core\Core.lua:365
OnDisable = defined @interface\AddOns\BigWigs_Core\Core.lua:345
GetBossModule = defined @interface\AddOns\BigWigs_Core\Core.lua:451
IterateBossModules = defined @interface\AddOns\BigWigs_Core\Core.lua:450
RegisterOption = defined @interface\AddOns\BigWigs_Core\Constants.lua:26
IsModule = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:499
db = {
}
SetDefaultModuleState = defined @interface\AddOns\BigWigs\Libs\AceAddon-3.0\AceAddon-3.0.lua:418
RAID_BOSS_WHISPER = defined @interface\AddOns\BigWigs_Core\Core.lua:265
GetCustomBossOptions = defined @interface\AddOns\BigWigs_Core\Core.lua:395
SetEnabledState = defined @interface\AddOns\BigWigs\Libs\A
AddOns:
Swatter, v7.4.5714 (TasmanianThylacine)
AngryKeystones, v
AtlasLoot, vv8.05.04
AtlasLootBurningCrusade, vv8.05.04
AtlasLootCataclysm, vv8.05.04
AtlasLootClassic, vv8.05.04
AtlasLootLegion, vv8.05.04
AtlasLootMistsofPandaria, vv8.05.04
AtlasLootWarlordsofDraenor, vv8.05.04
AtlasLootWrathoftheLichKing, vv8.05.04
BigWigs, vv68.1
BigWigsCore, v
BigWigsOptions, v
BigWigsPlugins, v
DBMCore, v7.2.16
DBMDefaultSkin, v
DBMStatusBarTimers, v
DebugLib, v5.1.DEV.337(/embedded)
InstancePortals, v8
KibsItemLevelContinued, v7.2.5.1
KuiMedia, v
KuiNameplates, v
KuiNameplatesCore, v
MogIt, v3.8.1
MogItOneHanded, v3.8.1
MogItOther, v3.8.1
MogItPlate, v3.8.1
MogItRanged, v3.8.1
MogItTwoHanded, v3.8.1
NPCScan, v7.2.0.2
Rarity, v1.0
RarityOptions, v
Skada, v1.7.1
SlideBar, v7.4.5714 (TasmanianThylacine)
Stubby, v7.4.5714 (TasmanianThylacine)
TellMeWhen, v8.4.0
TomTom, vv70200-1.0.0
TransmogTokens, v1.4.6
WorldQuestTracker, v
BlizRuntimeLib_enUS v7.2.5.70200
(ck=40e)

pg. 2
Date: 2017-08-12 00:20:22
ID: 5
Error occured in: Global
Count: 1
Message: ..\AddOns\BigWigs_Options\Options.lua line 899:
attempt to call method 'Open' (a nil value)
Debug:
BigWigs_Options\Options.lua:899:
BigWigs_Options\Options.lua:888
(tail call): ?
[C]: ?
[string "safecall Dispatcher[3]"]:9:
[string "safecall Dispatcher[3]"]:5
(tail call): ?
...nterface\AddOns\MogIt\Libs\AceGUI-3.0\AceGUI-3.0.lua:314: Fire()
...Libs\AceGUI-3.0\widgets\AceGUIContainer-TabGroup.lua:156: SelectTab()
BigWigs_Options\Options.lua:1043: OpenConfig()
BigWigs_Options\Options.lua:242: Open()
BigWigs\Loader.lua:327:
BigWigs\Loader.lua:319
BigWigs\Loader.lua:1380: OnClick()
...ddOns\AtlasLoot\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:116:
...ddOns\AtlasLoot\Libs\LibDBIcon-1.0\LibDBIcon-1.0.lua:116
Locals:
None
AddOns:
Swatter, v7.4.5714 (TasmanianThylacine)
AngryKeystones, v
AtlasLoot, vv8.05.04
AtlasLootBurningCrusade, vv8.05.04
AtlasLootCataclysm, vv8.05.04
AtlasLootClassic, vv8.05.04
AtlasLootLegion, vv8.05.04
AtlasLootMistsofPandaria, vv8.05.04
AtlasLootWarlordsofDraenor, vv8.05.04
AtlasLootWrathoftheLichKing, vv8.05.04
BigWigs, vv68.1
BigWigsCore, v
BigWigsOptions, v
BigWigsPlugins, v
DBMCore, v7.2.16
DBMDefaultSkin, v
DBMStatusBarTimers, v
DebugLib, v5.1.DEV.337(/embedded)
InstancePortals, v8
KibsItemLevelContinued, v7.2.5.1
KuiMedia, v
KuiNameplates, v
KuiNameplatesCore, v
MogIt, v3.8.1
MogItOneHanded, v3.8.1
MogItOther, v3.8.1
MogItPlate, v3.8.1
MogItRanged, v3.8.1
MogItTwoHanded, v3.8.1
NPCScan, v7.2.0.2
Rarity, v1.0
RarityOptions, v
Skada, v1.7.1
SlideBar, v7.4.5714 (TasmanianThylacine)
Stubby, v7.4.5714 (TasmanianThylacine)
TellMeWhen, v8.4.0
TomTom, vv70200-1.0.0
TransmogTokens, v1.4.6
WorldQuestTracker, v
BlizRuntimeLib_enUS v7.2.5.70200
(ck=40e)

Any additional information? (example: WoW language if not English) (Attach screenshots here if available, do not link externally)

In the BigWigs options, the tab called "options" doesn't load and is blank. Nothing else seems to affect it other than Kibs, and nothing else seems to be interfered with.

There are multiple issues here:

1. That addon doesn't correctly include the "AceGUI" library with it, which is a requirement for the "AceConfigDialog" library that comes with it.
   Using BugSack, this is obvious, as there is an error every time you log in. I'm not sure why your swatter didn't pick up on it, but I'd recommend removing it and replacing it with BugSack.

2. An oversight in the Ace3 libraries allowing addons that have not correctly packaged all their libraries, to break addons that have done it correctly (BigWigs in this case).

I have fixed the Ace3 libraries so this problem cannot occur. The fixed libraries will be included in an upcoming version of BigWigs, which means it can no longer be interfered with.

However, the addon in question, "Kibs" still needs to be fixed.
After inspecting the code for Kibs, what they need to do is remove the "AceConfigDialog" library from being included as it is not being used. I will attempt to contact the author to see if this can be done.

The author responded pretty quickly, however, doesn't seem too interested in resolving the problem. Opting instead to "leave it until patch 7.3". Assuming they don't forget to fix it.

Personally, I would recommend removing this addon. I would also recommend replacing Swatter with BugSack, since Swatter clearly wasn't telling you about the error every time you log in.

On a positive note, the latest release of BigWigs includes the newer Ace libraries, which can no longer be affected by other addons in this way.

Thanks for helping resolve this, since this loophole has been around for years, and I'm sure I've seen someone report this error in BigWigs before but could never resolve it.