WowAce

What steps will reproduce the problem?
1. Update to latest version.
2. Log in to a WoW toon with the addon enabled.
3. See LUA error.

What is the expected output? What do you see instead?
  I expect to be able to access the addon using either the slash command or the Interface menu.  Instead, the slash command returns an error and the interface menu does not have a GatherMate2 entry.  I have reproduced this issue both with GatherMate2 as the only active addon, and with all installed addons enabled.

What version of the product are you using?
1.32.1

Do you have an error log of what happened?
Message: ...face\AddOns\GatherMate2\Libs\AceDB-3.0\AceDB-3.0.lua:263: bad argument #1 to 'sub' (string expected, got nil)
Time: 11/20/14 22:56:25
Count: 1
Stack: [C]: in function `sub'
...face\AddOns\GatherMate2\Libs\AceDB-3.0\AceDB-3.0.lua:263: in main chunk

Locals: (*temporary) = nil
(*temporary) = 1
(*temporary) = 2
(*temporary) = "string expected, got nil"

Please provide any additional information below.
(I've been trying to get a working data import from GatherMate2_Data so I can run it through Routes, and I can't tell if I broke something or if going from 1.27 to 1.32.1 broke something...

Sounds like your version is way old. This error was fixed a long time ago.