"Data pack validation failed!" almost every time I create a configured_feature/placed_feature pair | Datapack Hub | Page 1

young reef Jun 30, 2025, 1:28 AM

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I've had this issue the past few times I've created configured and placed features. I don't remember how I fixed it the last time; all I know is that it is either the configured feature or placed feature file invalidating the datapack (removed the files and pack passed validation.)

silent nightBOT Jun 30, 2025, 1:28 AM

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young reef I've had this issue the past few times I've created configured and placed featur...

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grim gale Jun 30, 2025, 1:28 AM

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What's the full error in the logs?

young reef Jun 30, 2025, 1:28 AM

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.../placed_feature/mossy_clay_pool.json

  "feature": "scenic:mossy_clay_pool",
  "placement": [
    {
      "type": "minecraft:count",
      "count": {
        "type": "minecraft:uniform",
        "min_inclusive": 3,
        "max_inclusive": 6
      }
    },
    {
      "type": "minecraft:in_square"
    },
    {
      "type": "minecraft:heightmap",
      "heightmap": "WORLD_SURFACE"
    }
  ]
}```

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One sec

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Errors in element scenic:mossy_clay_pool:
java.lang.IllegalStateException: Failed to parse scenic:worldgen/configured_feature/mossy_clay_pool.json from pack file/scenic_datapack
at ....DELETED LONG BLOCK OF ERROR...
at org.prismlauncher.EntryPoint.main(EntryPoint.java:70)
Caused by: java.lang.IllegalStateException: Not a string: ["minecraft:air"]
at knot//com.mojang.serialization.DataResult$Error.getOrThrow(DataResult.java:287)
at knot//com.mojang.serialization.DataResult.getOrThrow(DataResult.java:81)
at knot//net.minecraft.class_7655.method_56915(class_7655.java:303)
at knot//net.minecraft.class_7655.method_45122(class_7655.java:319)
... 36 more

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let me send the configured feature

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📎 mossy_clay_pool.json

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the only line with "minecraft:air" is under "cannot_replace": [ "minecraft:air" ],

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which spyglass says is good

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update: tried changing from a list of strings to just a single string, no dice

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error log said "not a tag" with that attempt, so i changed it to "#minecraft:air", got this new one:
Feature order cycle found, involved sources: [Reference{ResourceKey[minecraft:worldgen/biome / scenic:scenic_plains]=net.minecraft.class_1959@7ffe3064}, Reference{ResourceKey[minecraft:worldgen/biome / scenic:scenic_forest]=net.minecraft.class_1959@485fc24f}]

grim gale Jun 30, 2025, 1:40 AM

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Good work solving that

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So now, a feature order cycle error means you have two or more features that appear in two or more biomes, but you've listed them in different orders in one or more of those biomes

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Which isn't allowed

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Features must always be listed in the same order relative to each other

young reef Jun 30, 2025, 1:41 AM

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Okay that's very doable thank you

silent nightBOT Jun 30, 2025, 1:53 AM

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Question Closed

Your question, #1389054843821494392 ("Data pack validation failed!" almost every time I create a configured_feature/placed_feature pair), was resolved!

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#1389054843821494392 message

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#"Data pack validation failed!" almost every time I create a configured_feature/placed_feature pair