Bro, relax, i think all cool. My game countinue starting. How i understand ModIDMapping is long process. I think all will good. Because my game crashed on 3 or 4 step of loading. Now its gonna start i think. If game again crash, i try your methods, okay?
I'll try to delete this. DecoCraft 2 better than this. I'm just importing my modpack from 1.7.10 v. To 1.12.2 and add some new good mods. These mods is not "must for live"