# 3dtile can load in v1.76 but can't load by v1.82

**URL:** <https://community.cesium.com/t/3dtile-can-load-in-v1-76-but-cant-load-by-v1-82/14112>\
**Category:** CesiumJS\
**Created:** [June 17, 2021, 9:45am UTC](https://community.cesium.com/t/3dtile-can-load-in-v1-76-but-cant-load-by-v1-82/14112 "2021-06-17T09:45:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![QianWu184](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/qianwu184/32/5037_2.png) [@QianWu184](https://community.cesium.com/u/QianWu184)\
**Post date:** [June 17, 2021, 9:45am UTC](https://community.cesium.com/t/3dtile-can-load-in-v1-76-but-cant-load-by-v1-82/14112/1 "2021-06-17T09:45:36Z")

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I used the same code to load the same model in the official download version 1.76 and version 1.82. Version 1.76 loads correctly. Version 1.82 has an error message:

> Cannot read property ‘undefined’ of undefined

I found in ModelUtility.computeBoundingSphere the gltf.scene is undefined (in version 1.76 is commonly 0) then I saw the model param requested address is a json (should be b3dm). What is the difference between parsing 3DTiles in 1.82 and 1.76?Or what can I do to fix it?

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**Author:** ![onsummer](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/onsummer/32/5408_2.png) [@onsummer](https://community.cesium.com/u/onsummer)\
**Post date:** [July 2, 2021, 6:17am UTC](https://community.cesium.com/t/3dtile-can-load-in-v1-76-but-cant-load-by-v1-82/14112/2 "2021-07-02T06:17:24Z")

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Solved in 1.83.

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**Author:** ![sam.rothstein](https://sea2.discourse-cdn.com/cesium/user_avatar/community.cesium.com/sam.rothstein/32/6584_2.png) [@sam.rothstein](https://community.cesium.com/u/sam.rothstein)\
**Post date:** [July 2, 2021, 2:19pm UTC](https://community.cesium.com/t/3dtile-can-load-in-v1-76-but-cant-load-by-v1-82/14112/3 "2021-07-02T14:19:35Z")

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@onsummer

That’s correct! @QianWu184 more details about 1.83 can be found here:

> <https://github.com/CesiumGS/cesium/blob/1.83/CHANGES.md>

-Sam