# \[Tileset.cpp:786\] Tile did not contain a geometricError

**URL:** <https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196>\
**Category:** Cesium for Unreal\
**Created:** [September 9, 2021, 3:40am UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196 "2021-09-09T03:40:59Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![5m3d](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/5m3d/32/3476_2.png) [@5m3d](https://community.cesium.com/u/5m3d)\
**Post date:** [September 9, 2021, 3:40am UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196/1 "2021-09-09T03:40:59Z")

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when i add a 3dtiles url in the ue4 ,zhe error comes out.

 ![image](https://global.discourse-cdn.com/cesium/original/2X/5/50d87296be767cf3eb7930861d9de227731c5c43.png)

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**Author:** ![5m3d](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/5m3d/32/3476_2.png) [@5m3d](https://community.cesium.com/u/5m3d)\
**Post date:** [September 9, 2021, 3:41am UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196/2 "2021-09-09T03:41:29Z")

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i need help

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**Author:** ![Marco13](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/marco13/32/2757_2.png) [@Marco13](https://community.cesium.com/u/Marco13)\
**Post date:** [September 9, 2021, 12:43pm UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196/3 "2021-09-09T12:43:22Z")

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The error stems from [this line](https://github.com/CesiumGS/cesium-native/blob/fc3f11dd2bfd670a5c4fba1bcfa71f263c47742a/Cesium3DTilesSelection/src/Tileset.cpp#L783).

According to [the 3d tiles specificaction](https://github.com/CesiumGS/3d-tiles/tree/main/specification#tileset), the `geometricError` is _required_ for each tile. So strictly speaking, the tileset that you are loading is invalid.

Which tool are you using to create the tileset? (You might consider adding the `geometricError` manually, but depending on the size of the tileset, that may be more or less feasible…)

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<div class="post-metadata">

**Author:** ![5m3d](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/5m3d/32/3476_2.png) [@5m3d](https://community.cesium.com/u/5m3d)\
**Post date:** [September 13, 2021, 7:26am UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196/4 "2021-09-13T07:26:37Z")

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The source of the data is also a problem for me, I only know that it is obtained from the skyline data type conversion. 😂 😂 😂

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<div class="post-metadata">

**Author:** ![Marco13](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/marco13/32/2757_2.png) [@Marco13](https://community.cesium.com/u/Marco13)\
**Post date:** [September 13, 2021, 2:25pm UTC](https://community.cesium.com/t/tileset-cpp-786-tile-did-not-contain-a-geometricerror/15196/5 "2021-09-13T14:25:34Z")

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I raised [https://github.com/CesiumGS/cesium-native/issues/343](https://github.com/CesiumGS/cesium-native/issues/343) for that. I think in this case, it could be reasonable to still allow the data to be loaded (CesiumJS does it, and “only” prints a warning), but there has not been a decision yet.