Hi! Thanks for reaching out. I understand that for the past two days, since December 20, 2025, your Tacx Training app isn’t successfully uploading your ride data to Garmin Connect after finishing a film, correct?

To help resolve this, could you please tell me if:

- You see any error message when the upload fails?
- Are you trying to upload via the Tacx app on your Windows device, or some other device?
- Has anything changed recently, like any updates to the Tacx app or Garmin Connect, or changes in your network connection?
- Have you checked if your ride data is saving properly locally in Tacx before trying to upload?

With that info, I can guide you better. Meanwhile, here are some common first steps for this kind of issue:

1. Check internet connection: Ensure your Windows device is connected to the internet without interruptions.
2. App updates: Make sure your Tacx Training app is up to date. Sometimes outdated apps cause sync problems.
3. Restart devices and apps: Restart your PC and reopen the Tacx Training app to refresh the connection.
4. Confirm login: Check if you're still logged into your Garmin Connect account within the Tacx app. Sometimes session expiration blocks uploads.
5. Manual upload option: If available, try exporting your ride data (like .tcx or .fit files) from the Tacx app and manually upload them to Garmin Connect as a test.

If none of these help, it’s possible there might be a temporary issue on Garmin’s side or a change in the Tacx-Garmin integration. From recent forum findings, some users have faced similar upload troubles around late 2025, often linked to account authorization or cloud service changes. Also, make sure the Tacx Trainer isn’t paired to multiple devices simultaneously, as that can interfere with data syncing1.

Let me know the details I asked about, and we can try more specific steps!

1. Internet connection is correct (no problems during the film itself). 2. I have reinstalled the app today from Windows store, so must be the latest version. 3. Restarting PC and reopening TDA did not solve the problem. I could see a pop up message saying that uploading was in progress (but this disappears quickly and still upload not visible in Garmin Connect). 4. I am logged in correctly 5. How can I manually upload a file to Garmin Connect as a test?

Thanks for the details! Since the automatic upload isn't showing the ride in Garmin Connect despite the upload message, trying a manual upload of your activity file is a great next step.

Here’s how you can manually upload your Tacx ride data to Garmin Connect via their website:

1. First, locate the activity file from the Tacx Training app on your Windows PC. Look for common activity file types like .fit, .tcx, or .gpx, usually saved in your Documents or Tacx folder. If you are unsure where these files are, let me know and I can guide you to find them.

2. Open a web browser and sign in to your Garmin Connect account at: https://connect.garmin.com

3. In the top right corner of the Garmin Connect page, you should see a plus sign (+) or an "Import Data" option.

4. Click "Import Data," then select "Browse" to locate and select your saved activity file.

5. Click "Import" to upload that activity manually.

This will help us confirm if the issue is with the data being generated correctly or the automatic upload functionality within the Tacx app itself.

Let me know if you need help locating your activity files in the Tacx app or with any of these steps!

Are you satisfied with the solution I provided so far?

How Do I Manually Upload an Activity I Recorded to Garmin Connect?

Manually updating is succesful. What to do next? Or is it an issue with servers or something like that?

Thanks for confirming that manual uploads work fine—that’s very helpful! Since your ride files can be manually uploaded successfully, this points to an issue with the Tacx Training app’s automatic upload process rather than your data or Garmin Connect itself.

Here are the next steps I recommend:

1. Check Tacx Training App Permissions and Sync Settings:
Sometimes the app’s automatic syncing or permission settings reset or get toggled off during updates or network changes. Inside the Tacx Training app settings on your Windows device, look for any options related to Garmin Connect sync or auto-upload and ensure they are enabled. If that option is off or gets disabled after a session, try toggling it on again.

2. Reauthorize Garmin Connect Integration:
Your login is correct, but sometimes the authorization token between Tacx and Garmin Connect can expire or get corrupted. Login out of Garmin Connect inside the Tacx app, then log back in to refresh the connection.

3. Clear App Cache and Temporary Files:
With repeated attempts, cached session data could cause sync failures. Since you reinstalled the app, the cache should be mostly cleared, but double-check for any residual temp files in your Windows user folders related to Tacx and remove them if you find any.

4. Check for Server or Service Updates:
There might be intermittent server-side syncing issues on Garmin’s or Tacx’s side, though I’m not seeing a widespread outage reported recently. You can keep an eye on the Garmin status page or Tacx support channels for announcements.

5. Test After a New Ride:
Do a short ride session and watch carefully when the upload prompt shows after finishing. Make sure the upload notification appears and check if the data shows up on Garmin Connect automatically within a few minutes.

If after trying these steps, the automatic upload still doesn’t work but manual upload continues to succeed, it would be good to escalate this to permanent support with detailed logs. You might want to contact Tacx support directly via [email protected] so they can check your account’s backend and any error logs related to your uploads.

Let me know if you want me to guide you through toggling app settings or reauthorizing Garmin Connect in the Tacx app!

Are you satisfied with the solution I provided so far?

1

How can I toggle app settings or reautorize Garmin Connect in the Tacx Desktop App?

Great question! Let me guide you through toggling the necessary settings and reauthorizing your Garmin Connect account inside the Tacx Training Desktop App on your Windows device.

### How to Toggle App Settings in Tacx Desktop App:
1. Open the Tacx Training Desktop App on your Windows PC.
2. Look for a menu icon or panel on the side and select Settings (if needed, expand the menu panel to see this).
3. In Settings, review your Privacy and Connection-related options:
- Search for "Privacy Settings" or "Radios" and make sure settings like “Let apps control radios” are toggled ON. This ensures the app can manage Bluetooth and other connections properly2.
4. Also, check under Device Manager (inside Settings) where your trainer is listed, and access Connection Settings to confirm it’s properly configured7.

### How to Reauthorize Garmin Connect inside Tacx Desktop App:
1. Inside the Tacx app, go to Settings (usually bottom right or menu area).
2. Find the section for Account or Integrations—this is where Garmin Connect login details will be.
3. Log out of your Garmin Connect account.
4. Close and reopen the app.
5. Return to the same place and log back in with your Garmin Connect credentials. This refreshes the connection token between Tacx and Garmin Connect1.

After doing this, do a new ride test and check if the automatic upload works as expected.

If anything looks unclear or the options are missing, please let me know—I can guide you step-by-step!

Are you satisfied with the solution I provided?