The following window appeared after handing in the quest "One of our Own" (35274 Alliance) and as the next step appeared ("Inspecting the Troops" 35276):

Date: 2015-01-14 18:50:22
ID: 1
Error occured in: Global
Count: 1
Message: ..\AddOns\WoWPro\WoWPro_Broker.lua line 477:
attempt to index field 'ocompleted' (a nil value)
Debug:
WoWPro\WoWPro_Broker.lua:477: NextStep()
WoWPro\WoWPro_Broker.lua:902: NextStepNotSticky()
WoWPro\WoWPro_Mapping.lua:464: MapPoint()
WoWPro\WoWPro_Broker.lua:950: CompleteStep()
WoWPro\WoWPro_Events.lua:164: AutoCompleteQuestUpdate()
WoWPro\WoWPro_Events.lua:658:
WoWPro\WoWPro_Events.lua:388
Locals:
k = 65
i = 1
GID = "EmmSoArak"
skip = false
QID = "35276"
qid = 35276
numquesttext = 1
complete = true
(for index) = 1
(for limit) = 1
(for step) = 1
l = 1
lquesttext = "2"
lcomplete = false
(_temporary) = nil
(_temporary) = 2
(_temporary) = "2"
(_temporary) = 2
(_temporary) = 35276
(_temporary) = 35276
(_temporary) = 35276
(_temporary) = 35276
(_temporary) = 35276
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(_temporary) = nil
(*temporary) = "attempt to index field 'ocompleted' (a nil value)"
QidMapReduce = defined @interface\AddOns\WoWPro\WoWPro_Broker.lua:8
Rep2IdAndClass =

{
good friend = {
}
best friend = {
}
hated = {
}
friend = {
}
friendly = {
}
stranger = {
}
revered = {
}
honored = {
}
hostile = {
}
buddy = {
}
unfriendly = {
}
neutral = {
}
exalted = {
}
acquaintance = {
}
}

AddOns:
BlizzBugsSuck, v6.0.3.2
Swatter, v5.21c.5521 (SanctimoniousSwamprat)
Accountant, v6.01.60000
Ace3, v
ACP, v3.4.14
Arh, v1.4.2
AskMrRobot, v19
AucAdvanced, v5.21c.5521 (SanctimoniousSwamprat)
AucFilterBasic, v5.21c.5521 (SanctimoniousSwamprat)
AucFilterOutlier, v5.21c.5521.5459(5.21c/embedded)
AucMatchUndercut, v5.21c.5521.5507(5.21c/embedded)
AucScanData, v5.21c.5521 (SanctimoniousSwamprat)
AucStatHistogram, v5.21c.5521 (SanctimoniousSwamprat)
AucStatiLevel, v5.21c.5521 (SanctimoniousSwamprat)
AucStatPurchased, v5.21c.5521 (SanctimoniousSwamprat)
AucStatSales, v5.21c.5521.5476(5.21c/embedded)
AucStatSimple, v5.21c.5521 (SanctimoniousSwamprat)
AucStatStdDev, v5.21c.5521 (SanctimoniousSwamprat)
AucStatWOWEcon, v5.21c.5521.5323(5.21c/embedded)
AucUtilAHWindowControl, v5.21c.5521.5347(5.21c/embedded)
AucUtilAppraiser, v5.21c.5521.5495(5.21c/embedded)
AucUtilAskPrice, v5.21c.5521.5447(5.21c/embedded)
AucUtilAutoMagic, v5.21c.5521.5443(5.21c/embedded)
AucUtilCompactUI, v5.21c.5521.5496(5.21c/embedded)
AucUtilEasyBuyout, v5.21c.5521.5507(5.21c/embedded)
AucUtilFixAH, v5.21c.5521 (SanctimoniousSwamprat)
AucUtilItemSuggest, v5.21c.5521.5417(5.21c/embedded)
AucUtilPriceLevel, v5.21c.5521.5458(5.21c/embedded)
AucUtilScanButton, v5.21c.5521.5403(5.21c/embedded)
AucUtilScanFinish, v5.21c.5521.5515(5.21c/embedded)
AucUtilScanProgress, v5.21c.5521.4979(5.21c/embedded)
AucUtilScanStart, v5.21c.5521.5347(5.21c/embedded)
AucUtilSearchUI, v5.21c.5521.5515(5.21c/embedded)
AucUtilSimpleAuction, v5.21c.5521.5514(5.21c/embedded)
AucUtilVendMarkup, v5.21c.5521.4828(5.21c/embedded)
Babylonian, v5.1.DEV.332(/embedded)
BadBoy, v12.504
BagBrother, v6.0.16
Bagnon, v6.0.16
Bazooka, vv2.4.2
BeanCounter, v5.21c.5521 (SanctimoniousSwamprat)
Breeze, vv1.10
ButtonForge, v0.9.38
Carbonite, v6.0.1
CarboniteInfo, v1.0
CarboniteNotes, v1.1
CarboniteNotesSample, v1.0
CarboniteQuests, v1.0
CarboniteSocial, v1.0
CarboniteWarehouse, v1.0
CarboniteWeekly, v1.0
Configator, v5.1.DEV.376(/embedded)
DebugLib, v5.1.DEV.337(/embedded)
GatherMate2, v1.33.4
Grail, v067
HealBot, v6.0.3.9
HealBotTips, v6.0.3.9
Informant, v5.21c.5521 (SanctimoniousSwamprat)
LibExtraTip, v5.12.DEV.363(/embedded)
MasterPlan, v0.23.1
MineOMatic, v6.0.3.007
MogIt, v3.4.0
MyBits, v
NugComboBar, v
omouse, v0.1.4
Pawn, v1.9.12
Postal, v3.5.1
Skada, v1.4-27
Stubby, v5.21c.5521 (SanctimoniousSwamprat)
TheUndermineJournal, v3.3.20150113
TipHelper, v5.12.DEV.351(/embedded)
TomTom, vv60000-1.1.1
WIM, v3.6.23
WoWPro, v6.0.3J
WoWProAchievements, v6.0.3J
WoWProDailies, v6.0.3J
WoWProLeveling, v6.0.3J
WowProProfession, v6.0.3J
WoWProRecorder, v6.0.0
WoWProWorldEvents, v6.0.3J
BlizRuntimeLib_enUS v6.0.3.60000
(ck=b18)

Good catch and a perfect stack trace.

fixed in f328ae4