[1.8] Some vanilla items not found / remapping missing elements

[jeffryfisher]

After upgrading my mods from 1.7.10 to 1.8, I worried that some of my own blocks and items might not carry over from my old worlds. I never expected to get errors on essential vanilla objects. However, a dozen vanilla items came up missing on my first try with an old (1.7.10) practice SP world (created at 1.6.4 I think).

 

I've searched both Forge and Google for this phenomenon, and I haven't found much, so I haven't found guidance, and I suspect that it's happening because of something I did (perhaps long ago).

 

Here's what the errors look like:

[12:17:06] [server thread/ERROR] [FML/]: There are unidentified mappings in this world - we are going to attempt to process anyway
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:flowing_water, id 8
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:potatoes, id 142
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:cocoa, id 127
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:carrots, id 141
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:cooked_fished, id 350
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:double_wooden_slab, id 125
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:fire, id 51
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:flowing_lava, id 10
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:lava, id 11
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:water, id 9
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:end_portal, id 119
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:double_stone_slab, id 43
[12:17:06] [server thread/ERROR] [FML/]: Unidentified item: minecraft:portal, id 90

 

It's just these 13 items. Do these pertain to corresponding blocks, or just the item-blocks themselves? It would be weird to step into a world from which all lava had been removed. I might find diamonds under former deep-cave lava lakes 

 

I don't see any rhyme or reason for these items to cause problems. My mods don't involve any of them. Any suggestions on how to investigate? Or should I ignore the warnings and "forge" ahead?

 

My ultimate goal is to upgrade my modded multiplayer server world. I'll back it up and see if I get similar errors there too.

[jeffryfisher]

Because one of my mods absorbed another (changing the modid on a few of my own items and blocks), I'm subscribing to the FMLMissingMappingsEvent. Besides handling my own changed names, I want to handle some missing vanilla items if I can.

 

Most of the missing "items" are blocks that have no corresponding inventory or drop. Fire? Flowing lava? There are just four worthy of remapping.

 

Potatoes (plural) remaps to potato (singular); likewise carrots. Cooked_fished remaps to cooked_fish. However, I'm stumped by cocoa. It looks like the cocoa item has been replaced by dye, which has subtypes, cocoa being BROWN.

 

Looking at the remap methods in FMLMissingMappingsEvent, I don't see how to specify an item subtype. Though it's hardly vital (I can probably replace cocoa stockpiles by adventuring faster than I can figure out how to replace cocoa item stacks by programming), I am curious to know if there's a way.

 

If not, then perhaps the FMLMissingMappingsEvent needs a remap method that conveys subtype (asserts hasSubtypes=true and then passes along a damage value).

 

Finally, if anyone has done missing block/item remapping, I'd love to see an example or tutorial so I can check my work.

 

Thanks!