# Tip to myself: Use often the error output of a card

**URL:** <https://community.homey.app/t/tip-to-myself-use-often-the-error-output-of-a-card/112515>\
**Category:** Ideas & Suggestions\
**Created:** [July 7, 2024, 9:18am UTC](https://community.homey.app/t/tip-to-myself-use-often-the-error-output-of-a-card/112515 "2024-07-07T09:18:08Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Theo\_de\_Koning](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/theo_de_koning/32/136062_2.png) [@Theo\_de\_Koning](https://community.homey.app/u/Theo_de_Koning)\
**Post date:** [July 7, 2024, 9:18am UTC](https://community.homey.app/t/tip-to-myself-use-often-the-error-output-of-a-card/112515/1 "2024-07-07T09:18:08Z")

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After changing a flow to make things less complex I had to change 4 of those type of cards.

![](https://us1.discourse-cdn.com/flex025/uploads/athom/original/3X/2/d/2d12370738c43f1725c2607f7db121d3413cdc83.jpeg)

This one was no longer passed on data for a few days.  
In the flow I could not see anything what was wrong so I make first a timeline card and the end of the flow.  
Later I get the feeling to take also the error output of the card for a message in the timeline to see the reason better.

After a few hours later I saw the error notification on my timeline and I was surprised.  
Didn’t expect that message now. By testing the cart the error came again and **not** the yellow line.

By copy one of the other card and changed it carefully, the error was gone.  
The yellow line game perfectly because the input was above 6 that time.

Next time I shall use that error output of a card sooner.