SSP > SMP Conversion

[oxidus5886]

Hi guys, new to the forum here.

I usually play single player on legends but a mate would like to play on a server. I have the server all set up correctly but when I move the world to the server I get the following in the console:

[10:54:30] [Server thread/ERROR] [FML]: Unidentified block: IC2:tinOre, id 227
[10:54:30] [Server thread/ERROR] [FML]: Unidentified block: IC2:copperOre, id 228
[10:54:30] [Server thread/ERROR] [FML]: Unidentified item: IC2:copperOre, id 228
[10:54:30] [Server thread/ERROR] [FML]: Unidentified item: IC2:tinOre, id 227
[10:54:30] [Server thread/WARN] [FML]: Forge Mod Loader detected missing blocks/items.

There are 4 missing blocks and items in this save.
If you continue the missing blocks/items will get removed.
A world backup will be automatically created in your saves directory.

Missing Blocks/Items:
IC2:tinOre
IC2:copperOre
IC2:copperOre
IC2:tinOre

I dont understand how I can get no problems when playing SP but flagging errors when copying the world across.

Can someone help? 

[plowmanplow]

That is happening because (for some unknown reason) the configs are different between the client and server for the Legends pack. You are perfectly safe to do a "/fml confirm" and let that complete.