In Minecraft SMP 1.0

Placed stronghold in INVALID biome at (4, -70)
Placed stronghold in INVALID biome at (46, 30)

I get this message when server starts. What does it mean? What can I do about it?

1 Answer 1


This is due to a stronghold being generated in an invalid location, such as under sand. From what I can gather, clearing your player data and running Chunkster (backup first) on your world should fix the problem.

  • I did run it, nothing has changed: in those locations there still is no stronghold; does this mean they have been created elsewhere, or that they have not been created at all?
    – o0'.
    Commented Feb 14, 2012 at 13:11
  • I'm not sure. This is a very old question on the Minecraft timescale, the biome generation and stronghold placement code has been updated multiple times since this question was asked.
    – fredley
    Commented Feb 14, 2012 at 13:39
  • Can you think about a method to discover if there are valid strongholds somewhere? Should I follow this question gaming.stackexchange.com/questions/30340/… or is there a cheaper method to just check if they exist?
    – o0'.
    Commented Feb 14, 2012 at 13:57
  • Get yourself an eye of ender and see if you can find one!
    – fredley
    Commented Feb 14, 2012 at 13:59
  • I thought about that, but what if there is just one instead of all three?
    – o0'.
    Commented Feb 14, 2012 at 14:02

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