Corrupted FIT file

Question

Long story short, sometimes my Forerunner 935 corrupts my swims when trying to download HRM data from my Garmin HRM-Swim. The FIT file doesn't sync to Garmin Connect 
 
 I get around this by "stripping" the Heart Rate field using https://www.fitfiletools.com/#/top 
 
 But Garmin Connect still can't read the file. 
 
 I tried playing with the FITSDK, but I get an error FIT decode error: Unexpected end of input stream at byte: 55385 
 
 Please help? 
 
 PS: Let me know what's an acceptable way to share the FIT file. 
 
 Thank you.

seilogramp · Accepted Answer

This will work - 
 I repaired this using Fit File Repair Tool . No nerdy knowledge required, just run it through the tool and it fixes most issues. Another free online tool is FIT File Tools , but it's not very good with fixing a swim activity. 
 For more extensive repairs, when Fit File Repair Tool doesn't work, have a look at this thread and answer - Can't upload to Connect or Strava 
 Some suggestions to help minimize the occurrence of corrupt fit files: 
 
 After verifying that everything has synced, remove the files in the \GARMIN\ACTIVITY folder on the device&rsquo;s file system using these directions: Removing Recorded Activities on a Garmin Fitness Device 
 Avoid excessive button presses such as pausing during your activity. If you need to pause frequently during your run, consider turning on auto pause 
 Regularly check for firmware updates using Garmin Express 
 If issues with corrupt files persist, contact Garmin Support

Former Member · Answer

solved

Former Member · Answer

solved

seilogramp · Answer

This will work - 
 Fixed using Fit File Repair Tool 
 Some suggestions to help minimize the occurrence of corrupt fit files: 
 
 Remove all activity fit files from the device using these directions - Removing Recorded Activities on a Garmin Fitness Device 
 Regularly check for firmware updates using Garmin Express 
 Please report back here when you encounter corrupted files again

seilogramp · Answer

MostafaMossaad said: is this forum a good place to make similar requests to fix corrupted FIT files? In other words, can I depend/rely on this forum to fix my corrupted FIT files? 
 I would not depend on the forum to fix all of your corrupt FIT file issues. It might seem like we fix a lot of these, but we aren't on Garmin's payroll. Nonetheless, I'm happy to help if possible. 
 Garmin's official stance on corrupt FIT files - Error Occurs When Manually Uploading Activity Data to Garmin Connect 
 
 NOTE: There are several third-party fit file correction programs on the web that may help to correct a corrupted file. However, there is no 100% guarantee that this will correct the file. Garmin does not provide any programs for correcting corrupted fit files, but you can search the web using the search terms "fit file fixer" or "fix fit file". Please be advised that the use of any third-party tool is at your own risk.

seilogramp · Answer

MostafaMossaad said: Let me know what's an acceptable way to share the FIT file. 
 2 options: 
 
 Zip the file, then in a reply post Insert >> Image/video/file >> click Upload >> browse for file >> OK. 
 Or upload the fit file to a file sharing service , such as OneDrive , Google Drive , Dropbox , etc., then share a link to the file in your post.

Corrupted FIT file

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