Lua error + way point arrow issue

[ZalidTheBur]

Keep getting the following Lua error :

Date: 2016-05-17 22:48:51
ID: 1
Error occured in: Global
Count: 1
Message: ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua line 3104:
   {{...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua line 243:
   attempt to compare number with nil}}
Debug:
   [C]: ?
   [C]: error()
   ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:3104: OnUpdate()
   ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:838:
      ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:838
Locals:

AddOns:
  Swatter, v5.21f.5579 (SanctimoniousSwamprat)
  WowheadLooter, v60014
  Cursor, v6.2.3.1
  NPCScan, v6.2.4.2
  NPCScanOverlay, v6.2.4.4
  Accountant, v6.02.60200
  AchieveIt, v
  AchievementsReminder, v
  AckisRecipeList, v6.2.4.1
  ACP, v3.4.24 
  AdiBags, vv1.8.4
  Altoholic, vr165
  APeonsBurden, vv2.3
  Armory, vv12.9.1
  ArmoryGuildBank, vv12.9.1
  AskMrRobot, v32
  AucAdvanced, v5.21f.5579 (SanctimoniousSwamprat)
  AucFilterOutlier, v5.21f.5579.5459(5.21f/embedded)
  AucMatchUndercut, v5.21f.5579.5507(5.21f/embedded)
  AucScanData, v5.21f.5579 (SanctimoniousSwamprat)
  AucStatSales, v5.21f.5579.5476(5.21f/embedded)
  AucStatSimple, v5.21f.5579 (SanctimoniousSwamprat)
  AucStatWOWEcon, v5.21f.5579.5323(5.21f/embedded)
  AucUtilAHWindowControl, v5.21f.5579.5575(5.21f/embedded)
  AucUtilAppraiser, v5.21f.5579.5545(5.21f/embedded)
  AucUtilAskPrice, v5.21f.5579.5447(5.21f/embedded)
  AucUtilAutoMagic, v5.21f.5579.5537(5.21f/embedded)
  AucUtilCompactUI, v5.21f.5579.5550(5.21f/embedded)
  AucUtilEasyBuyout, v5.21f.5579.5576(5.21f/embedded)
  AucUtilItemSuggest, v5.21f.5579.5417(5.21f/embedded)
  AucUtilPriceLevel, v5.21f.5579.5535(5.21f/embedded)
  AucUtilScanButton, v5.21f.5579.5403(5.21f/embedded)
  AucUtilScanFinish, v5.21f.5579.5515(5.21f/embedded)
  AucUtilScanProgress, v5.21f.5579.4979(5.21f/embedded)
  AucUtilScanStart, v5.21f.5579.5347(5.21f/embedded)
  AucUtilSearchUI, v5.21f.5579.5556(5.21f/embedded)
  AucUtilSimpleAuction, v5.21f.5579.5531(5.21f/embedded)
  AucUtilVendMarkup, v5.21f.5579.4828(5.21f/embedded)
  Babylonian, v5.1.DEV.332(/embedded)
  BadBoy, v13.000
  BattlePetDailyTamer, v1.5.3
  BigWigs, v4.897
  BodyGuardAway, v2.2
  BonusRollPreview, v60200.27-Release
  Chinchilla, vv2.7.4
  ClassTimer, v2.3.60200.1
  Collectinator, v6.2.3.2
  CollectMe, v2.7.4
  Configator, v5.1.DEV.396(/embedded)
  CooldownCount, v6.1.0
  Cork, v6.0.0.57
  CrossRealmAssist, v0.5
  DamnAchievementSpam, v
  DataStore, vr55
  DataStoreAchievements, vr41
  DataStoreAgenda, vr22
  DataStoreAuctions, v6.0.001
  DataStoreCharacters, vr35
  DataStoreContainers, vr51
  DataStoreCrafts, vr68
  DataStoreCurrencies, vr30
  DataStoreGarrisons, vr14
  DataStoreInventory, vr43
  DataStoreMails, vr43
  DataStorePets, vr38
  DataStoreQuests, vr35
  DataStoreReputations, vr36
  DataStoreSpells, vr26
  DataStoreStats, vr25
  DataStoreTalents, vr51
  DBD, v0.9
  DebugLib, v5.1.DEV.337(/embedded)
  Decursive, v2.7.4.4
  DurabilityStatus, v
  EasyMail, v
  Factionizer, v6.02.00.13 16.02.02
  FishingBuddy, v1.6c
  FlaresThatWork, v2.3.2
  FocusHealthPercent, v4.0.1
  FollowerLocationInfo, v0.11-release5
  FollowerLocationInfoData, v0.8-release
  FollowerLocationInfoJournal, v0.11-release5
  Gatherer, v5.0.0
  Grid, v6.0.3.1710
  GTFO, v4.38
  GuildCheck, vv 2.4.9
  HandyNotes, vv1.4.6
  HandyNotesDraenorTreasures, v1.16a
  IdiotCheck, v6.2.5
  InFlightLoad, v6.2.001
  Informant, v5.21f.5579 (SanctimoniousSwamprat)
  InterruptNoSpam, v1.61g
  IskarAssist, v
  ItemLevelDisplay, v1.9.5 6.2.2
  LegionWardrobe, v17
  LibExtraTip, v5.12.DEV.395(/embedded)
  LoggerHead, v183
  MacroBank, v1.11
  MasterPlanA, vA
  MinimalArchaeology, v6.0.5 (2014-12-15)
  MinimapButtonFrame, v3.1.10e
  MinimapButtonFrameSkinPack, v3.0.1b
  MogIt, v3.5.10
  MogItAccessories, v
  NeedPrimalSpirits, v1.2
  Omen, v3.1.11
  Overachiever, v0.84
  Pawn, v1.9.28
  PetBattleMaster, v2.1.2
  PetBattleQualityGlow, v1.0.3
  PetJournalEnhanced, v2.9.16
  PetMarket, v1.3
  PetTracker, v6.2.5
  PetTrackerBreeds, v
  PetTrackerConfig, v
  PetTrackerJournal, v
  PetTrackerSwitcher, v
  PetTrackerUpgrades, v
  premadefilter, v2.0.1
  QuickMark, v60100
  RaidAchieveFilter, v1.8.3
  RaidAchievement, v
  RaidAchievementOldModules, v
  RangeColors, v
  Rarity, v1.0
  RarityOptions, v
  Rematch, v4.3.7
  SafariHatnotification, v
  SavedInstances, v6.3.0
  SellOMatic2, va062
  SellOMatic2List, va062
  SilverDragon, vv3.2.2
  Skada, v1.4-33
  SkillHelper, vv3.2.15
  SlideBar, v5.21f.5579 (SanctimoniousSwamprat)
  SpamThrottle, vv2.8
  Stubby, v5.21f.5579 (SanctimoniousSwamprat)
  SuperDuperMacro, v2.6.1
  SwindlerPreventer, v5.0.1 (15799) BETA
  TargetHealthPercent, v5.0
  TellMeWhen, v7.4.0
  TheUndermineJournal, v4.1.20160517
  TidyPlates, v6.17.1
  TidyPlatesThreatPlates, v7.013-Alpha
  TidyPlatesHub, v
  TidyPlatesWidgets, v
  TipHelper, v5.12.DEV.389(/embedded)
  TolBaradReminder, v1.3
  TomTom, vv60200-2.1.0
  WIM, v3.7.5
  WoWDBProfiler, v
  ZygorGuidesViewer, v5.0
  BlizRuntimeLib_enUS v6.2.4.60200 <none>
  (ck=11b9)  

I did a reinstall and it worked for a while but its back again.
I get the error when I hearth to 2 Moons or do a similar action.
It also causes the arrow to bug out and stop working.

[ZG Support 1]

Try disabling all other addons and see if you have the problem. DataStore is an out-dated addon (hasn't been updated since WoW 6.0.3) and out-dated addons can cause these problems. I'm sure DataStore isn't the only one that you have that's out-dated, but it's one that I already know is out-dated.

[ZalidTheBur]

Interesting. Its not a conflict as it happens with only Zygor running :

Message: ...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:3104: {{...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:243: attempt to compare number with nil}}
Time: 05/18/16 00:50:30
Count: 1
Stack: [C]: in function `error'
...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:3104: in function `OnUpdate'
...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:838: in function <...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:838>

Locals: (*temporary) = "{{...ZygorGuidesViewer\Libs\LibRover-1.0\LibRover-1.0.lua:243: attempt to compare number with nil}}"

I tried it on my mage this time and it happens on teleporting. Easy to replicate.

EDIT: Just realised I still had ACP (Addon Control Panel) enabled. Testing...

EDIT 2 : Weird. Turning off ACP stopped the error. I've now turned all my addons back on and it does not seem to be happening on my mage. Maybe turning them off and and on again reset something ?
I'll report back on whether it has stopped happening or not on my druid soon.

EDIT 3 : Still happening on my druid. I'll try the addons off and see what happens but got to wait for hearth.

[ZalidTheBur]

Further testing leaves me scratching my head.

1. I tried an alt with only Zygor enabled. Hearthed = Error

2. Logged in to an alt with only Zygor enabled. Logged out. Re-enabled my addons. Hearthed = Error

3. Went on to my mage and hearthed = Error (did this as mage was working earlier)

4. Turned off all addons on an alt. Logged in. Hearthed. No error. Logged out and re-enabled Zygor. Logged in. Garrison Hearthed, and then teleported to Org via cloak and no error on either.

5. Turned off all addons on an alt. Logged in. Hearthed. No error. Logged out and re-enabled Zygor. Logged in. Logged out and re-enabled my other addons. Garrison Hearthed = Error

That's as much testing as I could do as the servers went down.

No 2 seems to show its a Zygor issue, but then 4 seems to contradict it.