After I login, I am simply clicking the Enable icon on fubar and get the error below.

I seem to be able to click it again to enable/disable it after that though.

Level 80 toon.
Date: 2010-12-01 23:30:33
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\WoWPro_Leveling\WoWPro_Leveling.lua line 81:
attempt to index field '?' (a nil value)
Debug:
(tail call): ?
WoWPro_Leveling\WoWPro_Leveling.lua:81:
WoWPro_Leveling\WoWPro_Leveling.lua:75
(tail call): ?

[string "safecall Dispatcher[1]"]:9:
[string "safecall Dispatcher[1]"]:5
(tail call): ?
...rkInventory\Externals\Ace3-AceAddon\AceAddon-3.0.lua:578: DisableAddon()
...rkInventory\Externals\Ace3-AceAddon\AceAddon-3.0.lua:590:
...rkInventory\Externals\Ace3-AceAddon\AceAddon-3.0.lua:571
(tail call): ?
WoWPro\WoWPro_Frames.lua:638: OnClick()
ChocolateBar\Chocolate.lua:233:
ChocolateBar\Chocolate.lua:230
AddOns:
Swatter, v5.9.4961 (WhackyWallaby)
ArkInventory, v3.02
ArkInventoryRules, v
ArkInventoryRulesExample, v1.00
Armory, vr383
ArmoryGuildBank, vr383
AtlasLoot, vv6.01.00
AtlasLootCataclysm, vr3071
Auditor2, v4.3.3
Babylonian, v5.1.DEV.130
BonusScanner, v5.4.0
BrokerAuditor, v4.3.3
Chatter, v1.0
ChocolateBar, vr120
Configator, v5.1.DEV.282
DBMCore, v
DBMLDB, v
DebugLib, v5.1.DEV.275
Dominos, v1.20.0
eError, v
Fizzle, vv1.5.2-1-g5dbab62
Gatherer, v3.1.16
GathererDBWowhead, v1.0.2009-12-09
GearScore, v3.1.20b - Release
Informant, v5.9.4961 (WhackyWallaby)
Mapster, v1.4.0-1-gcc6fd16
nameplateFix, v1.0
Omen, v3.1.0
OmniCC, v4.0.waffles8
Postal, v3.4.4
PowerAuras, v4.9
Quartz, v3.0.4-3-gda87e5d
Recount, v
SellOMatic, vv1.2.9a
SexyMap, v
ShadowedUnitFrames, vv3.3.2-1-ge77455c
SlideBar, v5.9.4961 (WhackyWallaby)
Stubby, v5.9.4961 (WhackyWallaby)
TidyPlates, v5.14.1 (r54)
TidyPlatesThreatPlates, v4.0-f
WoWPro, v2.0.4
WoWProLeveling, v2.0.4
zBrokerDurability, v1.3
BlizRuntimeLib_enUS v4.0.3.40000
(ck=443)

No more info and no repeated reports, I'm closing this.

Not sure why this occurred, anyone have any ideas?