What steps will reproduce the problem?
1. Typing /lm add [item].  Any item...
2. Only happens when Atlasloot Enhanced add-on is enabled (v5.07.05 and prior versions as well).
3.

What is the expected output?

Supposed to open the LootMaster Window with the item.

What do you see instead?

Message: ...ce\AddOns\AtlasLoot\Libs\AceComm-3.0\AceComm-3.0.lua:98 attempt to call upvalue 'callbackFn' (a string value)
Time: Mon Aug 17 12:41:08 2009
Count: 1
Stack: [string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
...ce\AddOns\AtlasLoot\Libs\AceComm-3.0\AceComm-3.0.lua:98 in function `callbackFn'
...ddOns\AtlasLoot\Libs\AceComm-3.0\ChatThrottleLib.lua:465 in function `SendAddonMessage'
...ce\AddOns\AtlasLoot\Libs\AceComm-3.0\AceComm-3.0.lua:104 in function `SendCommMessage'
...nterface\AddOns\epgp_lootmaster_ml\lootmaster_ml.lua:357 in function `SendMonitorMessage'
...nterface\AddOns\epgp_lootmaster_ml\lootmaster_ml.lua:789 in function `AddLoot'
Interface\AddOns\epgp_lootmaster\lootmaster_core.lua:277 in function `?'
...e\AddOns\epgp\libs\AceConsole-3.0\AceConsole-3.0.lua:68 in function `?'
Interface\FrameXML\ChatFrame.lua:3505 in function `ChatEdit_ParseText'
Interface\FrameXML\ChatFrame.lua:3176 in function `ChatEdit_SendText'
Interface\FrameXML\ChatFrame.lua:3200 in function `ChatEdit_OnEnterPressed'
[string "*:OnEnterPressed"]:1: in function <[string "*:OnEnterPressed"]:1>

Locals: sent = 155
(*temporary) = "ALERT"
(*temporary) = nil
(*temporary) = 155
(*temporary) = 155
(*temporary) = "attempt to call upvalue 'callbackFn' (a string value)"
callbackFn = "ALERT"
callbackArg = nil
textlen = 155

What version of the product are you using?

0.3.56

Do you have an error log of what happened?

Yes, see above.

Please provide any additional information below.

The problem seems to have something to do with the way it interacts with Atlasloot Enhanced. After clicking close on the Lua error message box, you can then hit return and actually add the item to the LootMaster window.  The problem, however, then is that you can't actually assign it to anyone.  The "Announce Loot" button is missing, and it also seems to break the "Discard Loot" button.  Finally, the only way to close the LM window at this point is via the command line, since the Discard Loot button doesn't work.  The add-on seems to work fine when Atlasloot Enhanced is disabled.