I just thought of an idea about helping to prevent problems caused by messed up files!
Making a Backup
Before you start to mod or add mods to your Mabinogi, I suggest that you create a backup 'Mabinogi' for your convenience so that when you mess up, you can fix it with a simple copy and paste.
Steps used to make sure you never get errors:
1. Make sure you have a completely clean and updated Mabinogi folder. E.g. Clean install or Remove all mods.
2. Copy (CTRL+C) your clean Mabinogi folder and paste (CTRL+V) it in a different location such as in 'My Documents'.
3. Rename it to something which you'll remember as being a clean Mabinogi. I named mine 'Original Components', but you can just call it 'Clean Mabinogi'.
4. Put mods back into your original Mabinogi folder (Default should be C:\Nexon\Mabinogi) and then you can play a modded Mabinogi whenever you want.
5. Whenever there's an update for Mabinogi, open the 'Clean Mabinogi' from your Documents and let the launcher update for you. If you didn't know there was an update and you opened your modded Mabinogi, have no fear, just Close the launcher and open the 'Clean Mabinogi' and let it update for you.
6. Once the launcher has finished updating for your 'Clean Mabinogi', go into the folder and click on the tab 'Date Modified' so that it will list the files from top to bottom (starting with folders, then files) in order of Date Modified. Copy all files and folders which have been modified in the last 7 days. Paste ALL of these files and folders into your Modded Mabinogi folder, replacing anything it asks.
This should work for all non-game-breaking mod packs to keep your mods. Unless of course, the patcher functions are broken, then that's not a problem with your own files. Also, if you're using Unofficial Tiara, you'll need to update to the newest version since your Data folder will most likely be outdated each update.
~Chris