This happens after first bag open or bank bag open, EVERY time, and has done for a year. There's also a similar one the first time u try to Search in the bag.

Date: 2015-07-04 16:44:14
ID: 1
Error occured in: Global
Count: 1
Message: ...AddOns\Bagnon_AccountSearch\Bagnon_AccountSearch.lua line 187:
attempt to index field 'FrameSettings' (a nil value)
Debug:

...AddOns\Bagnon_AccountSearch\Bagnon_AccountSearch.lua:187: GetBagnonVariableLinks()
...AddOns\Bagnon_AccountSearch\Bagnon_AccountSearch.lua:207: UpdateVisibility()
...AddOns\Bagnon_AccountSearch\Bagnon_AccountSearch.lua:60: OnHide()
Bagnon\components\inventory.lua:17:
Bagnon\components\inventory.lua:16

Bagnon\components\frame.lua:67: HideFrame()
Bagnon\main.lua:102:
Bagnon\main.lua:99
(tail call): ?
(tail call): ?
Bagnon\main.lua:249: oldToggleBag()
...erface\AddOns\ZygorGuidesViewer\InventoryManager.lua:633: ToggleBag()
..\FrameXML\MainMenuBarBagButtons.lua:21: BagSlotButton_OnClick()

  [string "*:OnClick"]:1

Locals:

AddOns:
Swatter, v5.21e.5566 (SanctimoniousSwamprat)
NPCScan, v6.2.0.1
NPCScanOverlay, v6.2.0.1
Ace3, v
AchievementsReminder, v
AllPlayed, v50400-2 $Revision: 296 $
AskMrRobot, v26
Atlas, v1.31.01
AtlasArena, v1.5.06
AtlasBattlegrounds, v1.31.01
AtlasBurningCrusade, v1.31.01
AtlasCataclysm, v1.31.01
AtlasClassicWoW, v1.31.01
AtlasDungeonLocs, v1.31.01
AtlasMistsofPandaria, v1.31.01
AtlasOutdoorRaids, v1.31.01
AtlasScenarios, v1.31.01
AtlasTransportation, v1.31.03
AtlasWorldEvents, v3.12
AtlasWrathoftheLichKing, v1.31.01
AtlasLoot, vv8.00.30
AtlasMajorCities, vv1.5.3
AtlasMajorCitiesEnhanced, vv1.07
AtlasQuest, v4.9.3
AucAdvanced, v5.21e.5566 (SanctimoniousSwamprat)
AucFilterBasic, v5.21e.5566 (SanctimoniousSwamprat)
AucFilterOutlier, v5.21e.5566.5459(5.21e/embedded)
AucMatchUndercut, v5.21e.5566.5507(5.21e/embedded)
AucScanData, v5.21e.5566 (SanctimoniousSwamprat)
AucStatHistogram, v5.21e.5566 (SanctimoniousSwamprat)
AucStatiLevel, v5.21e.5566 (SanctimoniousSwamprat)
AucStatPurchased, v5.21e.5566 (SanctimoniousSwamprat)
AucStatSales, v5.21e.5566.5476(5.21e/embedded)
AucStatSimple, v5.21e.5566 (SanctimoniousSwamprat)
AucStatStdDev, v5.21e.5566 (SanctimoniousSwamprat)
AucStatWOWEcon, v5.21e.5566.5323(5.21e/embedded)
AucUtilAHWindowControl, v5.21e.5566.5347(5.21e/embedded)
AucUtilAppraiser, v5.21e.5566.5545(5.21e/embedded)
AucUtilAskPrice, v5.21e.5566.5447(5.21e/embedded)
AucUtilAutoMagic, v5.21e.5566.5537(5.21e/embedded)
AucUtilCompactUI, v5.21e.5566.5550(5.21e/embedded)
AucUtilEasyBuyout, v5.21e.5566.5507(5.21e/embedded)
AucUtilFixAH, v5.21e.5566 (SanctimoniousSwamprat)
AucUtilItemSuggest, v5.21e.5566.5417(5.21e/embedded)
AucUtilPriceLevel, v5.21e.5566.5535(5.21e/embedded)
AucUtilScanButton, v5.21e.5566.5403(5.21e/embedded)
AucUtilScanFinish, v5.21e.5566.5515(5.21e/embedded)
AucUtilScanProgress, v5.21e.5566.4979(5.21e/embedded)
AucUtilScanStart, v5.21e.5566.5347(5.21e/embedded)
AucUtilSearchUI, v5.21e.5566.5556(5.21e/embedded)
AucUtilSimpleAuction, v5.21e.5566.5531(5.21e/embedded)
AucUtilVendMarkup, v5.21e.5566.4828(5.21e/embedded)
Babylonian, v5.1.DEV.332(/embedded)
BagBrother, v
Bagnon, v6.2.1
BagnonAccountSearch, v1.7.0
BattlePetsCollector, v6.0.3.10
BeanCounter, v5.21e.5566 (SanctimoniousSwamprat)
BittensSpellFlashHunter, v60100.201503092107
BittensSpellFlashLibrary, v60100.201503092107
BodyGuardAway, v2.2
Configator, v5.1.DEV.382(/embedded)
DBMCore, v
DBMDefaultSkin, v
DBMGarrisonInvasions, v
DBMLDB, v
DBMSpellTimers, v
DBMStatusBarTimers, v
DebugLib, v5.1.DEV.337(/embedded)
DragonHider, v
EZTrap, v6.2.22
FishingBuddy, v1.5.4
FlightMap, v6.1.0.0
FloAspectBar, v
GatherMate2, v1.34
GTFO, v4.37.2
HandyNotes, vv1.3.3
HandyNotesDraenorTreasures, v1.14a
Informant, v5.21e.5566 (SanctimoniousSwamprat)
LibExtraTip, v5.12.DEV.390(/embedded)
LibSharedMedia30, v3.0-93
Mapster, v1.6.3
MasterPlan, v0.63
MasterPlanA, v
MogIt, v3.5.3
MogItAccessories, v
MogItHighlighter, vv1.3.2
Omen, v3.1.11
OpenAll, v1
OpenRaid, v2.1
Overachiever, v0.82
RaidAchievement, v
RaidAchievementOldModules, v
RealmChecker, v
Recount, vv6.2.0f release
SavedInstances, v6.2.0
SkillHelper, v2.2.228
SlideBar, v5.21e.5566 (SanctimoniousSwamprat)
SpellFlash, v6.23
SpellFlashX, v1.0.8 Beta
SpellFlashCore, v2.0.7
Stubby, v5.21e.5566 (SanctimoniousSwamprat)
TipHelper, v5.12.DEV.389(/embedded)
Titan, v5.6.8.60200
TitanClock, v5.6.8.60200
TitanCurrTrack, v1.3.1
TitanDurability, v1.24
TitanEasyHonor, v1.11.40300
TitanGold, v5.6.8.60200
TitanGuild, v6.0.3.1
TitanLocation, v5.6.8.60200
TitanLootType, v5.6.8.60200
TitanPerformance, v5.6.8.60200
TitanRecount, v4.0.0
TitanRepair, v5.6.8.60200
TitanReputation, v3.8.6
TitanSocial, v6.1r32
TitanSpec, v4.1
TitanSpeed, v6.0.001
TitanTreasury, v22
TitanVolume, v5.6.8.60200
TitanXP, v5.6.8.60200
TomTom, vv60200-1.0.0
TradeSkillInfo, vv2.3.6
TradeSkillMaster, vv2.10.26
TradeSkillMasterAdditions, vv2.1.5
TradeSkillMasterAppHelper, vv2.0.3
TradeSkillMasterCrafting, vv2.6.19
TradeSkillMasterDestroying, vv2.1.12
TradeSkillMasterItemTracker, vv2.1.3
ZygorGuidesViewer, v5.0
BlizRuntimeLib_enUS v6.2.0.60200
(ck=10e8)

AccountSearch is not maintained by me nor it has been updated to the latest version.