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When I type:

//set 7271

To change it to a modded block, it says 7271 isn't a valid block name.

Is there any way I can make it understand block IDs?

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What block do you think 7271 is? – Ronan Apr 3 '12 at 19:37
up vote 2 down vote accepted

That's because, well, 7271 isn't a valid block name. In fact, it doesn't refer to anything at all in vanilla Minecraft. Additionally, even if it does refer to a mod-related ID, that would be an item ID, not a block ID, and WorldEdit doesn't always play too nice with mods.

If you need a list of block IDs, you can check the wiki here.

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All items have values above 255, making it easy to separate the Block IDs from the Item IDs. -MinecraftWiki – RHINO_Mk.II Apr 3 '12 at 19:55
It's a modded block. to be precise. – Ashley Davies Apr 3 '12 at 20:03
Not sure if WorldEdit supports Block IDs above minecraft's default 255. – RHINO_Mk.II Apr 3 '12 at 20:07
There is, unfortunately, no way to use Railcraft rails in WorldEdit. Even using //stack, it will convert it to vanilla rails. Sorry. I tried it before, attempting to replace a long line of rail with speed rails. Unfortunately, RailCraft rails don't play nice with WorldEdit. – Unionhawk Apr 3 '12 at 21:43
Thanks Union. It was putting them as ordinary when I was pasting and such too, which got on my nerves a lot (I'm trying to make a lot of very, very big identical tunnels which is not fun when you need to remake track heh). I'll accept this answer either way. – Ashley Davies Apr 4 '12 at 20:39

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