> 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/tracking-code/no-data-after-deploy.md).

# Tracking Code Correctly Deployed but No Data Flowing In

### 1. Common Causes <a href="#id-1-chang-jian-yuan-yin" id="id-1-chang-jian-yuan-yin"></a>

* **Some pages are missing the Ptengine tracking code**
  * The tracking code must be installed on all pages you want to track. If you have restricted the tracking scope, make sure the target pages are included.
* **Data delay**
  * Even if the tracking code has been correctly installed, data may not appear immediately due to delay.
  * After installing the tracking code, data requires at least one session settlement period (default is 30 minutes after session inactivity) before it is reflected in the overview or heatmap.
* **Incorrect domain settings**
  * Please check in the "Profile Settings" of the management dashboard that the registered domain is correct. Ptengine only tracks the configured domain.
* **Incorrect data time range**
  * Make sure the target time range starts from the date the tracking code was installed.
* **PC website and mobile website have different HTML source code**
  * Make sure the Ptengine tracking tag is also installed in the HTML source code of the mobile website.
* **Browser extensions blocking Ptengine**
  * If ad-blocking software is installed, it may block Ptengine's tracking.
* **Excluding specific IP or UA visits**
  * Make sure Ptengine is not configured to exclude specific visits.
* **Website uses CSP**
  * If the website uses a Content Security Policy (CSP) but has not added Ptengine's domain to the whitelist, tracking may not work correctly.

### 2. How to Verify Data Measurement <a href="#id-2-que-ren-shu-ju-ce-liang-fang-fa" id="id-2-que-ren-shu-ju-ce-liang-fang-fa"></a>

Steps to verify real-time data:

1. Open the target page in a new tab.
2. Go to the "Real-time" tab in the Ptengine management dashboard and enter the test URL in the URL bar.
3. If you can see the visit record, the tracking is working correctly.