I was able to replicate and solve the below error.

The error happens if you have both Animated power bars and hide non-power activated at the same time. If you click on a target with power (i.e, mana, rage, energy etc) then click on another target without power (i.e, an npc), the error pops out and nothing appears for the target frame.

Disabling the animation OR hide non-power stops the error.

ok ty very much i love this addon and its a part of my custom made ui so without it im lost lol

524x PitBull4-v4.0.0-beta41\Controls\Controls.lua:58: <unnamed> doesn"t have a "OnEvent" script <in C code> PitBull4-v4.0.0-beta41\Controls\Controls.lua:58: in function "?" PitBull4-v4.0.0-beta41\Controls\Controls.lua:121: in function "Delete" PitBull4-v4.0.0-beta41\Controls\BetterStatusBar.lua:1056: in function "onDelete" PitBull4-v4.0.0-beta41\Controls\Controls.lua:111: in function "Delete" PitBull4-v4.0.0-beta41\ModuleHandling\BarModules.lua:394: in function <PitBull4\ModuleHandling\BarModules.lua:383>(tail call): ? PitBull4-v4.0.0-beta41\ModuleHandling\Module.lua:319: in function "Update" PitBull4-v4.0.0-beta41\UnitFrame.lua:823: in function "Update" PitBull4-v4.0.0-beta41\UnitFrame.lua:849: in function "UpdateGUID" PitBull4-v4.0.0-beta41\Main.lua:1485: in function "CheckGUIDForUnitID" PitBull4-v4.0.0-beta41\Main.lua:1496: in function "?" libs\CallbackHandler-1.0\CallbackHandler-1.0-6.lua:147: in function <libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:147> <string>:"safecall Dispatcher[1]":4: in function <string>:"safecall Dispatcher[1]":4 <in C code> <string>:"safecall Dispatcher[1]":13: in function "?" libs\CallbackHandler-1.0\CallbackHandler-1.0-6.lua:92: in function "Fire" ...\DataStore\libs\AceEvent-3.0\AceEvent-3.0-3.lua:120: in function <...\DataStore\libs\AceEvent-3.0\AceEvent-3.0.lua:119> <in C code> <string>:"TARGETNEARESTENEMY":1: in function <string>:"TARGETNEARESTENEMY":1

Locals: nil

get an error whil target or targetoftarget frame active:

Message: Interface\AddOns\PitBull4\Controls\Controls.lua:58: <unnamed> doesn't have a "OnEvent" script
Time: 11/28/12 19:25:26
Count: 9719
Stack: [C]: in function `SetScript'
Interface\AddOns\PitBull4\Controls\Controls.lua:58: in function `?'
Interface\AddOns\PitBull4\Controls\Controls.lua:121: in function `Delete'
...terface\AddOns\PitBull4\Controls\BetterStatusBar.lua:1056: in function `onDelete'
Interface\AddOns\PitBull4\Controls\Controls.lua:111: in function `Delete'
...erface\AddOns\PitBull4\ModuleHandling\BarModules.lua:394: in function <...erface\AddOns\PitBull4\ModuleHandling\BarModules.lua:383>
(tail call): ?
Interface\AddOns\PitBull4\ModuleHandling\Module.lua:319: in function `Update'
Interface\AddOns\PitBull4_PowerBar\PowerBar.lua:73: in function <Interface\AddOns\PitBull4_PowerBar\PowerBar.lua:50>

Locals: (*temporary) = <unnamed> {
 0 = <userdata>
}
(*temporary) = "OnEvent"
(*temporary) = nil

Message: PitBull4-v4.0.0-beta40\Main.lua:1728: Bad argument #1 to "MakeSingletonFrame". "boss5" is not a singleton UnitID
Time: 12/01/12 00:49:47
Count: 1
Stack: Interface\AddOns\PitBull4\UnitFrame.lua:166: in function `func'
Interface\AddOns\PitBull4\Main.lua:1728: in function <Interface\AddOns\PitBull4\Main.lua:1722>
(tail call): ?
Interface\AddOns\PitBull4\Main.lua:1325: in function `OnProfileChanged'
Interface\AddOns\PitBull4\Main.lua:1419: in function <Interface\AddOns\PitBull4\Main.lua:1384>
(tail call): ?
[C]: ?
[string "safecall Dispatcher[1]"]:9: in function <[string "safecall Dispatcher[1]"]:5>
(tail call): ?
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:543: in function `EnableAddon'
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:636: in function <Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:621>
[C]: in function `LoadAddOn'
Interface\FrameXML\UIParent.lua:299: in function `UIParentLoadAddOn'
Interface\FrameXML\UIParent.lua:373: in function `TimeManager_LoadUI'
Interface\FrameXML\UIParent.lua:690: in function <Interface\FrameXML\UIParent.lua:657>

Locals: <none>

After the update anytime I would reload ui or log out/in I would have to go into profiles and choose the profile I wanted AFTER choosing a profile that had nothing done to it.

It also won't save any changes done to it and a lot of units that I don't have turned on (target's targets target, etc) is showing even though its not checked. (I have to check it and uncheck it to make it disappear).

 Is no one else having this issue? :/

fixed in beta41. Thanks!

So, after today's update my chi is no longer showing up on my monk

Same problem here.

Seeing the same issue here.  The Chi addon shows up in the Addons list, but it is NOT currently listed in the available modules for Pitbull in the config UI.

After i recently updated the addon its seems that it doesnt hide blizzard alternate power bar anymore (the special bar you get from quests/raid bosses)

I am having the same issue. 

don't work pibull. i use kokr client.

Message: Interface\AddOns\PitBull4\Main.lua:1728: Bad argument #1 to `MakeSingletonFrame'. "boss5" is not a singleton UnitID
Time: 11/19/12 11:40:07
Count: 1
Stack: [C]: in function `error'
Interface\AddOns\PitBull4\UnitFrame.lua:166: in function `func'
Interface\AddOns\PitBull4\Main.lua:1728: in function <Interface\AddOns\PitBull4\Main.lua:1722>
(tail call): ?
Interface\AddOns\PitBull4\Main.lua:1325: in function `OnProfileChanged'
Interface\AddOns\PitBull4\Main.lua:1419: in function <Interface\AddOns\PitBull4\Main.lua:1384>
(tail call): ?
[C]: ?
[string "safecall Dispatcher[1]"]:9: in function <[string "safecall Dispatcher[1]"]:5>
(tail call): ?
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:543: in function `EnableAddon'
Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:636: in function <Interface\AddOns\Ace3\AceAddon-3.0\AceAddon-3.0.lua:621>
[C]: in function `LoadAddOn'
Interface\FrameXML\UIParent.lua:299: in function `UIParentLoadAddOn'
Interface\FrameXML\UIParent.lua:373: in function `TimeManager_LoadUI'
Interface\FrameXML\UIParent.lua:690: in function <Interface\FrameXML\UIParent.lua:657>

Locals: <none>