Corrupt fit file

6438766 said:

Unexpected end of file while parsing

That sounds like a common error received when using kiesewetter.nl

Fit File Repair tool  revealed and fixed 3 problems:

• timestamps not in chronological order
• unexpected big change of distance value
• distance values not in ascending order

This will work - B5AH0944-fixed.fit

Unfortunately your Forerunner 35 has a history of having this issue, as you can see be reading through the Forerunner 30/35 forum. 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’s file system using these directions: Removing Recorded Activities on a Garmin Fitness Device 
• Try to avoid excessive button presses during your activity.
• Regularly check for firmware updates using Garmin Express
• If issues with corrupt files persist, contact Garmin Support.