> For the complete documentation index, see [llms.txt](https://helps.ptengine.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helps.ptengine.com/en/faq/data/self-check.md).

# Self-Check When Data Is Not Displaying Correctly

## Self-Check When Data Is Not Displaying Correctly

If you notice any issues with the data displayed in Ptengine, checking the following items will help you identify the cause of the problem. Please start by trying a simple self-check.

## **1. Data Display Requires a Certain Amount of Time**

In Ptengine, except for real-time data, data is displayed approximately 30 minutes after visitors leave. Therefore, if you check the data immediately after installing the code, it may not yet be reflected. After installing the code, please make sure to check the data at least 30 minutes or more after installation.

## **2. Correct Installation of Basic Tags Is Required**

To aggregate data in Ptengine, you must correctly install the basic tag code. Please note that if the code is not installed, data will not be displayed. Also, please verify that the project ID of the installed tag is correct.

## **3. Correct Domain Configuration Is Required**

If the domain configuration is incorrect, data may not be aggregated correctly. Please pay attention to the following points:

* Verify that the configured domain name is correct.
* If the domain is configured in IP address format, data will not be aggregated. Please configure it in the correct format.

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## Summary

By performing these self-checks, you can often resolve data issues smoothly. If the issue persists, please contact the Ptengine support team. With correct installation and configuration, you can maximize the use of Ptengine's data!