In versions after 2.14, when another mod adds the same materials as NuclearCraft, in my case https://github.com/EmosewaPixel/GregsConstruct , the Tinkers stencil table and casting table completely stop working (not only for those materials, but for everything). I assume this has to do with the check you added so it doesn't crash with other mods.

Should be fixed in the latest build :)

Yes, I am having the same issue with the thorium material, the game always crashes when there is a TiC material conflict: https://pastebin.com/mBHFf5Tn

Please add config options to disable integration, it is a MUST for all mods that do compat!

@MasterBuilder747 this is a different issue, and one that GregTech CE should look into, just as I had to do when other mods integrated their materials before NC. Personally I don't even understand why TiC wants the game to crash when this happens - surely they can just ignore the registration and move on, but whatever, I'll add some configs to optionally disable this.

@EmosewaPixel As others have pointed out, this is a broader issue regarding saving radiation-related NBT data to items. Will try to find a solution as quickly as possible :)