# Are my blocks correct? It works but crashes

**URL:** <https://community.thunkable.com/t/are-my-blocks-correct-it-works-but-crashes/2466806>\
**Category:** Questions about Thunkable X\
**Created:** [June 14, 2023, 10:18pm UTC](https://community.thunkable.com/t/are-my-blocks-correct-it-works-but-crashes/2466806 "2023-06-14T22:18:40Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![tatiang](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/tatiang/32/55482_2.png) [@tatiang](https://community.thunkable.com/u/tatiang)\
**Post date:** [June 16, 2023, 4:38pm UTC](https://community.thunkable.com/t/are-my-blocks-correct-it-works-but-crashes/2466806/4 "2023-06-16T16:38:09Z")

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There’s a known bug that prevents changing a Data Viewer List’s background color using blocks. See this: [Can't change container background color manually in DVL](https://community.thunkable.com/t/cant-change-container-background-color-manually-in-dvl/2459628)

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