Mod talk:Obsidian Mod/@comment-50.45.65.160-20120712183827/@comment-4674838-20120712184652

For highly technical issues, you should consult the tConfig Wikia and the Terraria Online client and server tools forum. We don't really cover advanced technical problems on this wiki (although we want to help where possible).

http://www.terrariaonline.com/threads/discussion-i-cant-build-or-install-the-obsidian-mod.89218

Yorai (one of the most knowledgeable modders) says it's because Obsidian's code is outdated for the current version of tConfig. Sounds like it won't work unless the source code itself is fixed.

Since it apparently can't be rebuilt, you'll have to downgrade to an older version of tConfig for the mod to work.