Re: Error Code 123:9d5d0e8f:b1d3c02d

Custom content can get outdated with patches. If it works when you remove your mods folder, then one or more mods/cc is no longer compatible with the game and you have to find those.

Use the 50/50 method: http://modthesims.info/wiki.php?title=Game_Help:Finding_Problem_Custom_Content

EDIT: Merged a few threads for the same error code

This error is mod related.