[1.8] How migrate block from one mod to other mod?

[Dark32]

I move block between mods (modid) and getting error about missing block, because i change modid block from "nord" to "nord_deco" for example. If i apply message, then i lost all old blocks with "nord:" midid on map.

How change modid alredy existing on map block from "nord" to "nord_deco" on load?

MCEdit and other map editor is not an option.

 

I think resolve this  chunk load event, but may exist easy way for it?

 

Sorry, my English is bad. It not my native language.

[jeffryfisher]

Note the FML. That means it is like the preInit, init and postInit in your mod's main class and handled by yet another similar method. It is not subscribed on a bus like in-game "events" (an unfortunate coincidence of naming).