Board Thread:Questions and Answers/@comment-174.124.251.160-20130420031207/@comment-64.72.210.199-20130527135259

The problem definately appears to be related to NEI, so I don't think the problem will be solved until NEI gets looked into. I tried troubleshooting to find when the issue happens, and found that if I start SP Tekkit, even with NEI enabled, if I don't use NEI at all (or turn it off right after I load the game), I can craft gold into iron ingots just fine with the minium stone.

If I use NEI to look up recipies, it stops allowing me to use most minium stone recipies, like gold to iron. At this point, to "correct" the issue, I would need to make sure I "stop" my NEI search by clearing it, save and quit my game, AND close out of tekkit entirely (I don't need to disable NEI...). After relaunching tekkit and my game, even with NEI enabled (but not searching with it), I am able to use the minum stone just fine again to craft iron out of gold.

I noticed that occasionally when launching my SP game, there is a message about a new version for NEI available. Maybe NEI is overwriting some old recipies somehow?