Got this upon logging into my Druid in The Dreamgrove with only Carbonite addons loaded..
Edit 1:
This error stopped after I left Dreamgrove...
Carbonite 7.2.5 Build e2b81c5 was latest from Curse at the time...

Message: Interface\AddOns\Carbonite\NxMap.lua:7288: attempt to compare number with nil
Time: 07/03/17 12:30:35
Count: 843
Stack: Interface\AddOns\Carbonite\NxMap.lua:7288: attempt to compare number with nilInterface\SharedXML\SharedBasicControls.lua:204: in function <Interface\SharedXML\SharedBasicControls.lua:203>
[C]: ?
Interface\AddOns\Carbonite\NxMap.lua:7288: in function <Interface\AddOns\Carbonite\NxMap.lua:7233>
(tail call): ?
(tail call): ?
Interface\AddOns\Carbonite\NxMap.lua:4827: in function `Update'
Interface\AddOns\Carbonite\NxMap.lua:3821: in function <Interface\AddOns\Carbonite\NxMap.lua:3705>

Locals: errorMessage = "Interface\AddOns\Carbonite\NxMap.lua:7288: attempt to compare number with nil"
DisplayMessageInternal = defined @interface\SharedXML\SharedBasicControls.lua:187
MESSAGE_TYPE_ERROR = 0

Now getting this after patching while in Dreamgrove....

627x Carbonite\NxMap.lua:7288: attempt to compare number with nil
Carbonite\NxMap.lua:7288: in function <Carbonite\NxMap.lua:7233>
(tail call): ?
(tail call): ?
Carbonite\NxMap.lua:4827: in function `Update'
Carbonite\NxMap.lua:3821: in function <Carbonite\NxMap.lua:3705>

Locals:
self =

{
InstMapWX2 = 1082.6640625
MiniBlks = 6
IconScale = 3
MenuIShowWorld = {
}
GIconMenuITogInst = {
}
TargetNextUniqueId = 1
MMScalesC = {
}
LOpts = {
}
TextFStrs = {
}
PlyrLastDir = 117.60806107405
Scrolling = false
Menu = {
}
EffScale = 0.63999998569489
Zone = 1077
WorldAlpha = 0
StartupShown = true
ScaleDraw = 163.25748502989
BackgndAlphaFade = 0.4
MoveLastX = 1081.2589384522
PlyrDir = 117.60806107405
PlyrSpeedCalcTime = 332636.947
MapPosYDraw = -1892.0062887053
PlyrSpeed = 0
MapScale = 16.293162178637
CurMapBG = false
PadX = 0
BGIncNum = 0
ViewSavedData = {
}
MapW = 501.79956054688
MMGathererUpdateDelay = 1
LClickTime = 0
MouseEnabled = true
ButAutoScaleOn = {
}
MapH = 284
MMScales = {
}
MapPosX = 1081.2589384522
BackgndAlphaTarget = 0.4
MapsDrawnOrder = {
}
BGGrowBars = true
ArrowScroll = 0
H = 141
Tick = 145
IconNIFrms = {
}
LastDungeonLevel = 0
BaseScale = 1
ToolBar = {
}
MoveLastY = -1892.0062887053
MenuIShowHerb = {
}
DotPartyScale = 1
PlyrX = 1081.2589384522
QuestAlpha = 0.3
InstMapWX1 = 1078.75
CurWorldUpdateOverlayNum = 1
Scale = 163.25748502994
Targets = {
}
BackgndAlpha = 0.4
ArrowPulse = 1
MenuIShowMine = {
}
MapId = 1077
MMOwn = false
Size1 = 1.1718750261934
ShowUnexplored = false
InstLevelSet = 0
Arch = {
}
PIconMenu = {
}
InstMapWY1 = -1892.9166
DotRaidScale = 1
IconFrms = {
}
StepTime = 0
PlyrSpeedX = 1081.2589384522
PlyrFrm = {
}
DebugAdjustScale = 0.1
ScaleDrawW = 0.0061252934272318
IconStaticFrms = {
}
UpdateTrackingDelay = 0
IconNavScale = 1
MiniFrms = {
}
InCombat = false
Win = {
}
InstanceId = false
RealScale = 163.25748502994
Data = {
}
MenuIShowTimber = {
}
CurOverlays = false
MMChkDelay = 20
InstMapWY2 = -1890.307225
LocTipFStrs = {
}
TrackPlyrs = {
}
TextFrm = {
}
DotPalScale = 1
TextScFrm = {
}
InstMapInfo = {
}
GIconMenuIFindNote = {
}
MMOwnedFrms = {
}
QuestWin = {
}
WorldHotspotsCity = {
}
InstMapId = 1077
PlyrY = -1892.0062887053
Cont = "8"
Tracking = {
}
Guide = {
}
WorldHotspots = {
}
Level = 10
PlyrRZY = 34.886181354523
MenuIMonitorZone = {
}
W = 150
MapsDrawnFade = {
}
CurWorldUpdateMapId = 1077
ContFrms = {
}
LocTipFrm = NxMapTip {
}
TileFrms = {
}
ScaleW = 0.00612529342723
UpdateTargetDelay = 0
CurOpts = {
}
MenuIPlyrFollow = {
}
TitleH = 0
PlyrSpeedY = -1892.0062887053
MapPosY = -1892.0062887053
IconWQFrms = {
}
MapPosXDraw = 1081.2589384522
ArchAlpha = 0.3
MapIndex = 1
PlyrRZX = 64.100623130798
KillShow = false
MenuIInstanceMaps = {
}
NeedWorldUpdate = true
BGIconMenu = {
}
DotZoneScale = 1
Frm = {
}
GIconMenu = {
}
TransMenu = {
}
MoveDir = 180
BackgndAlphaFull = 1
}
frm = NxIcon1 {
0 =
NxMap = {
}
NxTip = "The Dreamgrove, Val'sharah (Druids Only)"
texture = {
}
}
bx = 1081.2463381188
by = -1892.0252822907
w = 16
h = 16
dir = 0
x = 63.778698444366
y = 34.158283472061
bw = 16
clipW = 501.79956054688
texX1 = 0
texX2 = 1
vx0 = 55.778698444366
vx1 = 55.778698444366
vx2 = 71.778698444366
bh = 16
clipH = 284
texY1 = 0
texY2 = 1
vy0 = 26.158283472061
vy1 = 26.158283472061
vy2 = 42.158283472061
(*temporary) = nil
(*temporary) = {
0 =
}
(*temporary) = 0
(*temporary) = 1
(*temporary) = 0
(*temporary) = 1
(*temporary) =
(*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 compare number with nil"