I'm experiencing decoding problems - throwing a ton of System.OverflowException - when decoding FIT files exported from Movescount. Previously I used 15.10 version of the SDK. Then I got invalid altitude values from the record messages. After upgrading to 16.73, I still don't get proper altitude values plus a lot of exceptions. They arise around decoding enhanced speed and altitude fields as I can see.
FitCSVTool however manages to decode the right messages...
Thank you for reporting this. We have addressed the issue and you will see a new updated FITSDK today. We have included the fix in both a new Beta release and a 16.74 release.