# List Viewer (Simple List) calling a Data Viewer List
**URL:** https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080
**Category:** Questions about Thunkable X
**Created:** [May 4, 2024, 5:17pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080 "2024-05-04T17:17:57Z")
**Posts on this page:** 16
**Page:** 1
### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 4, 2024, 5:17pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/1 "2024-05-04T17:17:57Z")
Hi, thunkers.
I have been searching on the forums for an answer to my question, but many of the possible solutions come with a thunkabe link that is expired, so I need to ask here:
I am working on a visual dictionary using Data Viewer list, but there are so many items that I have decided to use a first screen with List Viewer (simple List) to make it easier to locate the element that we need, that is to say, that the List Viewer works as a kind of DVL Index.
The problem is that I can’t find a way to make the List Viewer activate the Data Viewer list …
Is it possible? Any suggestion on how to solve this?
Thanks
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### Author:  [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 4, 2024, 5:29pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/2 "2024-05-04T17:29:35Z")
You’re using Any Component blocks that require a component ID. This is a hidden value generated by Thunkable and is unique for each component. So the `in list app variable RowObject get #i` block needs a list of components, not a list of data source values as you have it.
One method is to use the row IDs as I demonstrate here: [Conditional Formatting of a Data Viewer List (aka "Painting the DVL")](https://community.thunkable.com/t/conditional-formatting-of-a-data-viewer-list-aka-painting-the-dvl/2078697).
Another is to use the `all Data Viewers` block from the Any Component drawer and then get #i of that list. That will provide component IDs.
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 4, 2024, 6:00pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/3 "2024-05-04T18:00:28Z")
Hi, Tatiang. Thanks for the reply.
I had already seen your approach to “painting the DVL”. I´m working on my own custom layout
Do you mean I have to create a variable and write something like this to have the ID?
And when you say
“Another is to use the `all Data Viewers` block from the Any Component drawer and then get #i of that list. That will provide component IDs.”
Are you meaning this?
Where should I use it? I´m a bit obfuscated, really.
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### Author:  [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 4, 2024, 6:14pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/4 "2024-05-04T18:14:15Z")
Yes and yes! I like the latter method. So you replace this:
with this:
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 4, 2024, 7:32pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/5 "2024-05-04T19:32:17Z")
I´m trying the latter method, applying it to all of the elements of the DVL
but the web server doesn´t seem to work very well today. Any way, I only get a white screen. Is there any other thing I should change?
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### Author:  [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 5, 2024, 12:02am UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/6 "2024-05-05T00:02:27Z")
A white screen usually means that you’re trying to get a property name that doesn’t exist. Start simple and get one line of blocks working before you attempt to make all of them work at once. I have a method I use for debugging Thunkable projects. The link is below.
·····················································································································
Need help? [How to Ask Great Questions](https://community.thunkable.com/t/how-to-ask-great-questions-v2-0/2689983) ✨ [Debugging A Project](https://community.thunkable.com/t/debugging-in-thunkable-x-video/849471) ✨ [API JSON Tutorial](https://community.thunkable.com/t/api-json-tutorial-video/1140575)
Want to hire a Certified Thunkable Expert? [Elevate your app with Tatiang on Fiverr](https://www.fiverr.com/s/726B4a)
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 5, 2024, 6:11pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/7 "2024-05-05T18:11:23Z")
> [@tatiang](#):
>
> So the `in list app variable RowObject get #i` block needs a list of components, not a list of data source values as you have it.
to which list of components do you refer
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 5, 2024, 6:17pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/8 "2024-05-05T18:17:47Z")
You mean this?
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 5, 2024, 6:57pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/9 "2024-05-05T18:57:52Z")
I cant find the blocks for debugging
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### Author:  [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 5, 2024, 8:29pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/10 "2024-05-05T20:29:54Z")
Did you watch the video I linked to? There are no debugging blocks. There is a _method_ I use for debugging.
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### Author:  [@tatiang](https://community.thunkable.com/u/tatiang)
#### Post date: [May 5, 2024, 8:31pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/11 "2024-05-05T20:31:08Z")
No. You had the blocks correct before:
You just need to figure out why it’s crashing.
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 5, 2024, 10:31pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/12 "2024-05-05T22:31:34Z")
Hi Tatiang.
Yes, I have seen your video, but I can’t find the blocks you use. I have been working in STP, and it generated a blank screen. I have switched to D&D, and it no longer generates it, but whatever choice I make in the Simple List, it always takes me to the same page 1 with the bee.
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 6, 2024, 4:44pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/13 "2024-05-06T16:44:05Z")
This is my DVL
And these are my blocks lately:
But unfortunately it´s not working for me.
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### Author:  [@ksampeicc](https://community.thunkable.com/u/ksampeicc)
#### Post date: [May 9, 2024, 10:49pm UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/14 "2024-05-09T22:49:32Z")
You don’t need to use cloud variables. When using a data source, it will be stored inside the app. Therefore, you can do something simpler. Just grab the “call data\_viewer\_list#” and set the row id to whatever you need. I am creating a password manager app, and therefore need to use data sources. Just start a new conversation addressing me “@ksampei@ihmschoolonline.org”
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### Author:  [@similar2similar](https://community.thunkable.com/u/similar2similar)
#### Post date: [May 10, 2024, 9:28am UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/15 "2024-05-10T09:28:47Z")
> [@ksampeicc](#):
>
> @ksampei@ihmschoolonline.org
Hi, Ksampei. I’ve just read that you have a way to solve this problem. That’s great. If you want a private conversation, my email is [similar2similar@gmail.com](mailto:similar2similar@gmail.com)
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### Author:  [@system](https://community.thunkable.com/u/system)
#### Post date: [August 8, 2024, 9:29am UTC](https://community.thunkable.com/t/list-viewer-simple-list-calling-a-data-viewer-list/2985080/16 "2024-08-08T09:29:18Z")
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