[Group Extraction] A normal screen with no issues

This Group Extraction help guide addresses cases where the task failed, but the screenshot shows a normal screen.

Before the guide, please first check the checklist when creating a group extraction task.

Checklist before group extraction

*Images are examples for better understanding.

The group extraction feature operates based on the structure of the page (source page) where you first selected the data.

Therefore, the URLs you enter afterward must have the same structure (tab composition, layout, etc.)to work without errors.

If you failed group extraction, first check whether the page structure of the initially extracted page matches the URL you entered for group extraction.

If, as above, the normal screen of the page to be extracted is displayed in the failure screenshot, please check the following.

Case 1. The structure is different from the initially extracted page

Cause and solution

If the screen shown in the error screenshot has a different structure from the page where you first extracted the data(e.g., tab configuration, data location, etc.), then the system could not relocate the initially configured data area and an error occurred.

In this case, the error code PartSelectionErroris very likely to be shown.

AsChecklist before group extractionguides, this is a typical case that occurs because the data composition can differ for each URL.

✅ Solution

• Choose and visit one of the URLs used for group extraction, then perform a new extraction.

• Once the extraction is successfully completed, please create a new group based on this extraction.

• When creating a new group, in the existing group task, [Copy URLs] if you click the button, you can copy all URLs at oncefrom the failed group, making it easy to reconfigure.

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Case 2. The structure is the same from the initially extracted page

Cause and solution

If the target page in the error screenshot is loaded normallyand the overall structure (layout, etc.) appears the same as the initially extracted page but an error still occurred, this is because the tab where you first selected the data does not exist on the target page for group extraction.

In this case, the error code is usually NoMatchingTabdisplayed.

🧩 Why does this problem occur?

1. When the page used as the group source does not represent the structure of the remaining URLs (→ e.g., in a shopping mall where page 1 has many special contents like banners, ads, and recommended products, but from page 2 onward only a general product list appears, you used the entirety of page 1 as the source)

2. When you selected an overly detailed ‘sub-tab’ during data selection (→ e.g., you selected an area like the ‘Best Reviews’ section that does not exist on other product pages without reviews)

✅ Solution

• For this error, creating a new group extraction task is the fastest solution. First, choose and visit one of the URLs used for group extraction, then extract the page that will become the new group source.

• At this time, it is important to select and extract a layout that represents the other URLs to be group-extracted. Especially for product list pages, where detailed elements like ads or MD products are mixed, choosing the common structure from page 2 onward instead of page 1is more stable.

*The image is an example assuming a case of group extraction for consecutive ‘list-type pages’.

• During the process of selecting the data tab after extraction, choose a data tab covering a slightly wider area than the one used in the failed group extraction task,(a tab that is more likely to exist in common),which can also help.

*Images are examples to aid understanding.

• If you select a specific tabthat exists on the source page but not on other pages, an error may occur because a matching detailed area cannot be found on the target page for group extraction.

*The image is an example assuming a case of group extraction for similar-structured ‘detail pages’.

• Note: By using the search bar in the results window, you can easily check which tab contains the desired data.

• Note: When creating a group, from the existing group task, [Copy URLs] if you click the button, you can copy all URLs at oncefrom the failed group, making it easy to reconfigure.

If it is still difficult to resolve the issue even after trying the instructed methods, please contact us at [email protected]. We will help after accurately diagnosing the cause.