# Unable to call data from Firebase
**URL:** https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234
**Category:** Questions about Thunkable X
**Created:** [September 22, 2018, 5:04pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234 "2018-09-22T17:04:54Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 5:04pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/1 "2018-09-22T17:04:54Z")
Hey, I’m letting you a video of my listviewer disappearing, can’t explain ☹
Can someone help ? Thanks !
[https://streamable.com/70x9w](https://streamable.com/70x9w)
It only disappears with these blocks on strangely, what are wrong with them ?
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### Author:  [@BrinaL](https://community.thunkable.com/u/BrinaL)
#### Post date: [September 22, 2018, 5:53pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/2 "2018-09-22T17:53:19Z")
Strange. Is [icloud](https://www.icloudcentral.com/) this a recent problem or was this [gimp](https://gimp.software/) there before.?
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 6:04pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/3 "2018-09-22T18:04:41Z")
I don’t know I just finished
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### Author:  [@Mark](https://community.thunkable.com/u/Mark)
#### Post date: [September 22, 2018, 8:41pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/4 "2018-09-22T20:41:32Z")
It’s difficult to tell without more context (i.e. what else is going on in the app) but one thing I would make sure and do is make sure you check the `'error'` blocks before inserting into the `'List'`. Another thing to try is to pull out blocks (especially the list insert blocks) one by one and see if/when the List Viewer stops disappearing. Then you’ll know what the offending block is. Similarly you could pull all the blocks out and start putting them back in one at a time until the List Viewer starts disappearing. Once again, then you’ll know what the offending block is.
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 8:52pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/5 "2018-09-22T20:52:37Z")
Gonna do this keeping you updated
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 9:18pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/6 "2018-09-22T21:18:09Z")
Hey, it shows me the error “undefined”
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 9:24pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/7 "2018-09-22T21:24:58Z")
(I deleted this post because the blinking / disapearing problem fixed by itself strangely)
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 9:36pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/8 "2018-09-22T21:36:21Z")
On this other screen I made it shows me and gathers the informations I want 😕
THANK YOU ALL FOR HELPING by the way
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 22, 2018, 10:29pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/9 "2018-09-22T22:29:22Z")
I found the problem. It is in the friend variable. It doesn’t recognize numbers (In blue) as a text…he can’t do that. Am I right ? If yes, what is the workaround for this issue please ?
But it’s strange because here :  I use the variable with a stored `Number` and not `Text` but it still works and my data is called. Is this linked to the use of RealtimeFB ?
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 23, 2018, 5:03pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/10 "2018-09-23T17:03:27Z")
That’s the most detailled I could do 🙂
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### Author:  [@AcrobatEpee](https://community.thunkable.com/u/AcrobatEpee)
#### Post date: [September 23, 2018, 7:00pm UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/11 "2018-09-23T19:00:06Z")
This was the solution.
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### Author:  [@ioannis](https://community.thunkable.com/u/ioannis)
#### Post date: [November 8, 2024, 11:55am UTC](https://community.thunkable.com/t/unable-to-call-data-from-firebase/48234/12 "2024-11-08T11:55:27Z")