Since the new unit, i've ridden 6 door activities on the unit and just one didn´t crash.
Very frustrating, i've been reporting this on the forum and by email as Garmin suggest on the latest beta version.
Here is the error file for today and the fit file, in zip format, since don´t know when, fit and txt can´t be uploaded directly,
Maybe it´s just me and my unit is wrong.