# Trying to check for changes, getting no data or SELECTION\_EMPTY error

**URL:** <https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527>\
**Category:** Uncategorized\
**Created:** [September 20, 2023, 10:02pm UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527 "2023-09-20T22:02:08Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![loupastern](https://forums.distill.io/letter_avatar_proxy/v4/letter/l/ecccb3/32.png) [@loupastern](https://forums.distill.io/u/loupastern)\
**Post date:** [September 20, 2023, 10:02pm UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/1 "2023-09-20T22:02:08Z")

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[https://www.nasdaqtrader.com/Trader.aspx?id=archiveheadlines&cat\_id=105](https://www.nasdaqtrader.com/Trader.aspx?id=archiveheadlines&cat_id=105)

That’s the web page. The Selector is the top **Headline** or **Alert#** on the page., but it’s not working. Either empty or SELECTION\_EMPTY error.

Using Firefox for this .

Tried it using the distill cloud page, and it seems to handle it better, but not 100% sure its working either, at least not throwing the error.

Any help in getting this working would be appreciated.

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<div class="post-metadata">

**Author:** ![ajitk](https://forums.distill.io/letter_avatar_proxy/v4/letter/a/ec9cab/32.png) [@ajitk](https://forums.distill.io/u/ajitk)\
**Post date:** [September 21, 2023, 1:22pm UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/2 "2023-09-21T13:22:55Z")

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Hello @loupastern - I am not sure what the headline is. Is it the page’s title [NasdaqTrader.com](http://NasdaqTrader.com) displayed in the header?

Can you try using the desktop app and see if that is able to monitor the page? Let me know what you find out.

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<div class="post-metadata">

**Author:** ![loupastern](https://forums.distill.io/letter_avatar_proxy/v4/letter/l/ecccb3/32.png) [@loupastern](https://forums.distill.io/u/loupastern)\
**Post date:** [September 21, 2023, 5:45pm UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/3 "2023-09-21T17:45:15Z")

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Its the headline as pictured here from this link. I would be checking for changes to the top headline (looking for new entries )

[https://www.nasdaqtrader.com/Trader.aspx?id=archiveheadlines&cat\_id=105](https://www.nasdaqtrader.com/Trader.aspx?id=archiveheadlines&cat_id=105)

 ![image](https://forums.distill.io/uploads/default/original/1X/b7ebd75965d4ab179038369ede407327ad816faa.png)

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<div class="post-metadata">

**Author:** ![ajitk](https://forums.distill.io/letter_avatar_proxy/v4/letter/a/ec9cab/32.png) [@ajitk](https://forums.distill.io/u/ajitk)\
**Post date:** [September 22, 2023, 4:53am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/4 "2023-09-22T04:53:16Z")

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Following [config](https://distill.io/docs/web-monitor/config-and-advanced-monitor-options/) works using the browser extension:

```json
{
  "selections": [
    {
      "frames": [
        {
          "index": 0,
          "excludes": [],
          "includes": [
            {
              "type": "css",
              "expr": "tr:nth-child(2) td:nth-child(4)",
              "fields": [
                {
                  "name": "text",
                  "type": "builtin"
                }
              ]
            }
          ]
        }
      ],
      "dynamic": true,
      "delay": 5
    }
  ],
  "ignoreEmptyText": true,
  "includeStyle": false,
  "dataAttr": "text",
  "regexp": {
    "expr": "",
    "flags": "gim"
  }
}

```

Can you try this out and if it works for you?

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<div class="post-metadata">

**Author:** ![loupastern](https://forums.distill.io/letter_avatar_proxy/v4/letter/l/ecccb3/32.png) [@loupastern](https://forums.distill.io/u/loupastern)\
**Post date:** [September 25, 2023, 5:29am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/5 "2023-09-25T05:29:53Z")

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Tried using that config , but it does not work for me. Getting the same error

 ![image](https://forums.distill.io/uploads/default/original/1X/a7653154220585536e000ab1bf0e559ecfd18e94.png)

I dont know enough about coding for this type of web page to know what the issue is.

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<div class="post-metadata">

**Author:** ![ajitk](https://forums.distill.io/letter_avatar_proxy/v4/letter/a/ec9cab/32.png) [@ajitk](https://forums.distill.io/u/ajitk)\
**Post date:** [September 25, 2023, 8:10am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/6 "2023-09-25T08:10:17Z")

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I see. Can you try using a different device and see if that works?

Another question: is the page opened in a tab to be checked for changes or is it forced to be checked in background? When in background, the page’s JavaScript can’t run to update dynamic parts of the page.

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<div class="post-metadata">

**Author:** ![loupastern](https://forums.distill.io/letter_avatar_proxy/v4/letter/l/ecccb3/32.png) [@loupastern](https://forums.distill.io/u/loupastern)\
**Post date:** [September 26, 2023, 2:32am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/7 "2023-09-26T02:32:47Z")

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The scan works on the cloud version as you can see

 ![image](https://forums.distill.io/uploads/default/original/1X/4b9b097db89e43c32bfbdbabafcd41bb30fb9821.png)

Javascript is enabled on the Firefox browser version.

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<div class="post-metadata">

**Author:** ![ajitk](https://forums.distill.io/letter_avatar_proxy/v4/letter/a/ec9cab/32.png) [@ajitk](https://forums.distill.io/u/ajitk)\
**Post date:** [September 26, 2023, 4:31am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/8 "2023-09-26T04:31:56Z")

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Thanks for the update. Can you test other browsers, or the desktop app?

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<div class="post-metadata">

**Author:** ![loupastern](https://forums.distill.io/letter_avatar_proxy/v4/letter/l/ecccb3/32.png) [@loupastern](https://forums.distill.io/u/loupastern)\
**Post date:** [September 26, 2023, 4:40am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/9 "2023-09-26T04:40:52Z")

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I tested in Vivaldi and it seemed to work.

Then tested in a clean Firefox profile , and it seems to work there as well.

So must be some interaction with one of the many add ons I use. Never ran into this issue before and Ive used Distill for years. So I’ll have to narrow down the problem .

Thing is , if the page loads normally in the same browser , then why would Distill have a problem ??

If you have any ideas, would appreciate hearing them

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<div class="post-metadata">

**Author:** ![ajitk](https://forums.distill.io/letter_avatar_proxy/v4/letter/a/ec9cab/32.png) [@ajitk](https://forums.distill.io/u/ajitk)\
**Post date:** [October 2, 2023, 11:23am UTC](https://forums.distill.io/t/trying-to-check-for-changes-getting-no-data-or-selection-empty-error/2527/10 "2023-10-02T11:23:38Z")

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It is interesting for sure. Can you test this in Firefox by creating a new profile? Checkout following article to learn more about how to create and use additional profiles in Firefox:

> **[Profile Manager - Create, remove or switch Firefox profiles | Firefox Help](https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles)**
>
> Firefox stores your personal information and settings in a profile folder. Learn to work with different profiles on Firefox.

Do let me know what you find out. Thanks!