# White screen disappear after disconnecting and connecting the same blocks on the same position

**URL:** <https://community.thunkable.com/t/white-screen-disappear-after-disconnecting-and-connecting-the-same-blocks-on-the-same-position/37075>\
**Category:** Questions about Thunkable X\
**Created:** [July 22, 2018, 8:12pm UTC](https://community.thunkable.com/t/white-screen-disappear-after-disconnecting-and-connecting-the-same-blocks-on-the-same-position/37075 "2018-07-22T20:12:26Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![xXdeveloperXx](https://avatars.discourse-cdn.com/v4/letter/x/439d5e/32.png) [@xXdeveloperXx](https://community.thunkable.com/u/xXdeveloperXx)\
**Post date:** [July 22, 2018, 8:12pm UTC](https://community.thunkable.com/t/white-screen-disappear-after-disconnecting-and-connecting-the-same-blocks-on-the-same-position/37075/1 "2018-07-22T20:12:26Z")

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I have found out that if I get sometimes a white screen, but I dont know why. Everytime when I disconnect the blocks of the method screen opens and connect then again the white screen disappear. Why does this happen? Is there a fail connection between the database and the programm?

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**Author:** ![actech](https://avatars.discourse-cdn.com/v4/letter/a/3d9bf3/32.png) [@actech](https://community.thunkable.com/u/actech)\
**Post date:** [July 23, 2018, 5:28am UTC](https://community.thunkable.com/t/white-screen-disappear-after-disconnecting-and-connecting-the-same-blocks-on-the-same-position/37075/2 "2018-07-23T05:28:06Z")

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White screen most often occurs when trying to retrieve non-existent object, an infinite loop and other errors in the algorithms. For this reason, when debugging the application I do not recommend to put the code in screen units Screen.Starts or Screen.Opens. Place check the blocks in a processing unit of a click event on a button.Click. In this case, you’ll know that the error is in the block you click.

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**Author:** ![ioannis](https://sea1.discourse-cdn.com/flex015/user_avatar/community.thunkable.com/ioannis/32/146956_2.png) [@ioannis](https://community.thunkable.com/u/ioannis)\
**Post date:** [November 8, 2024, 12:01pm UTC](https://community.thunkable.com/t/white-screen-disappear-after-disconnecting-and-connecting-the-same-blocks-on-the-same-position/37075/3 "2024-11-08T12:01:10Z")

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