Error message popped up when entering the old Karazhan after patch 7.1.0

Date: 2016-10-26 22:57:34
ID: 7
Error occured in: Global
Count: 1
Message: ...nterface\AddOns\_NPCScan.Overlay\Modules\Minimap.lua line 641:
   attempt to compare nil with number
Debug:
   [C]: ?
   ...nterface\AddOns\_NPCScan.Overlay\Modules\Minimap.lua:641
      ...nterface\AddOns\_NPCScan.Overlay\Modules\Minimap.lua:632
Locals:

AddOns:
  Swatter, v7.0.1 (<%codename%>)
  NPCScanOverlay, v7.0.3.4
  NPCScanOverlayBroker, v1.2.7
  AckisRecipeList, v7.0.3.8
  Altoholic, vr171
  ArkInventory, v30717
  ArkInventoryRules, v10003
  ArkInventoryRulesExample, v10000
  AtlasLoot, vv8.01.05
  AucAdvanced, v7.1.5675 (TasmanianThylacine)
  AucFilterBasic, v7.1.5675 (TasmanianThylacine)
  AucFilterOutlier, v7.1.5675.5459(7.1/embedded)
  AucMatchUndercut, v7.1.5675.5585(7.1/embedded)
  AucStatHistogram, v7.1.5675 (TasmanianThylacine)
  AucStatiLevel, v7.1.5675 (TasmanianThylacine)
  AucStatPurchased, v7.1.5675 (TasmanianThylacine)
  AucStatSales, v7.1.5675.5598(7.1/embedded)
  AucStatSimple, v7.1.5675 (TasmanianThylacine)
  AucStatStdDev, v7.1.5675 (TasmanianThylacine)
  AucStatWOWEcon, v7.1.5675.5613(7.1/embedded)
  AucUtilAHWindowControl, v7.1.5675.5575(7.1/embedded)
  AucUtilAppraiser, v7.1.5675.5666(7.1/embedded)
  AucUtilAskPrice, v7.1.5675.5599(7.1/embedded)
  AucUtilAutoMagic, v7.1.5675.5587(7.1/embedded)
  AucUtilCompactUI, v7.1.5675.5629(7.1/embedded)
  AucUtilEasyBuyout, v7.1.5675.5576(7.1/embedded)
  AucUtilFixAH, v7.1.5675 (TasmanianThylacine)
  AucUtilItemSuggest, v7.1.5675.5651(7.1/embedded)
  AucUtilPriceLevel, v7.1.5675.5633(7.1/embedded)
  AucUtilScanButton, v7.1.5675.5631(7.1/embedded)
  AucUtilScanFinish, v7.1.5675.5588(7.1/embedded)
  AucUtilScanProgress, v7.1.5675.4979(7.1/embedded)
  AucUtilScanStart, v7.1.5675.5347(7.1/embedded)
  AucUtilSearchUI, v7.1.5675.5672(7.1/embedded)
  AucUtilSimpleAuction, v7.1.5675.5654(7.1/embedded)
  AucUtilVendMarkup, v7.1.5675.4828(7.1/embedded)
  Babylonian, v5.1.DEV.332(/embedded)
  BeanCounter, v7.1.5675 (TasmanianThylacine)
  BrokerGarrison, v2.0.8.1
  BrokerSmartBuff, v7.0a
  BuyEmAll, v3.3.2
  CaerdonWardrobe, vv0.38.0
  CandyBuckets, v7.0.0.160629
  Configator, v5.1.DEV.406(/embedded)
  DataStore, vr59
  DataStoreAchievements, vr42
  DataStoreAgenda, vr23
  DataStoreAuctions, v6.0.001
  DataStoreCharacters, vr36
  DataStoreContainers, vr53
  DataStoreCrafts, vr73
  DataStoreCurrencies, vr31
  DataStoreGarrisons, vr16
  DataStoreInventory, vr46
  DataStoreMails, vr46
  DataStorePets, vr39
  DataStoreQuests, vr36
  DataStoreReputations, vr37
  DataStoreSpells, vr27
  DataStoreStats, vr26
  DataStoreTalents, vr54
  DBMCore, v
  DBMDefaultSkin, v
  DBMLDB, v
  DBMStatusBarTimers, v
  DebugLib, v5.1.DEV.337(/embedded)
  Decursive, v2.7.5_beta_2
  Enchantrix, v7.1.5675 (TasmanianThylacine)
  EnchantrixBarker, v7.1.5675 (TasmanianThylacine)
  ExRT, v3790
  FishingBuddy, v1.7.11
  GarrisonMissionManager, vv52
  Grail, v082
  GrailAchievements, v011
  GrailQuestsdeDE, v001
  GrailReputations, v007
  GrailWhen, v001
  HandyNotes, vv1.4.11
  HandyNotesAchievements, v0.4.19
  HandyNotesDraenorTreasures, v1.20a
  Informant, v7.1.5675 (TasmanianThylacine)
  IskarAssist, v
  LibExtraTip, v5.12.DEV.412(/embedded)
  MasterPlan, v0.104
  MasterPlanA, vA
  MobInfo2, v7.1.0
  NPCScan, v7.1.0.1
  Overachiever, v0.98
  OverachieverTabs, v0.98
  Pawn, v2.1.4
  PetTracker, v7.0.3
  PetTrackerBreeds, v
  PetTrackerConfig, v
  PetTrackerJournal, v
  PetTrackerSwitcher, v
  PetTrackerUpgrades, v
  PokemonTrainer, v7.0.2
  Postal, vv3.5.8
  RaidAchievement, v1.124
  Skada, v1.5-12
  SmartBuff, v7.0a
  Stubby, v7.1.5675 (TasmanianThylacine)
  TipHelper, v5.12.DEV.405(/embedded)
  Titan, v5.9.1.70100
  TitanBag, v5.9.1.70100
  TitanClock, v5.9.1.70100
  TitanGold, v5.9.1.70100
  TitanLocation, v5.9.1.70100
  TitanLootType, v5.9.1.70100
  TitanPerformance, v5.9.1.70100
  TitanRepair, v5.9.1.70100
  TitanVolume, v5.9.1.70100
  TitanXP, v5.9.1.70100
  TomTom, vv70000-1.1.0
  Wholly, v059
  BlizRuntimeLib_deDE v7.1.0.70100 <none>
  (ck=e5d)