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Intensity minutes not recorded for just one day?

My Forerunner 35 (v3.60) recorded two activities properly on one day... I can see the activities on the watch, phone (iPhone 13, 16.0.1), and I can see them online, but no intensity minutes were recorded (there's at least 50 minutes at HR level 2 and 3). All my other aerobic activities have intensity minutes recorded, but the intensity minutes didn't get recorded for these two on this one day. I've synced from both the watch and the phone, turned both off/on, signed out of the app, even uninstalled and re-installed the app. Still no luck. Online, the activities are listed (and appear to be accurate in terms of time, HR, intensity, and distance), the page says "You do not have timeline data for this day.") I know intensity minutes are a popular (unpopular?) topic here... any idea why this one day didn't log a timeline or the intensity minutes? (Activities since have been recorded, along with intensity minutes, just fine).

0 trux over 2 years ago

7890641 said:
HR, intensity, and distance), the page says "You do not have timeline data for this day.")

It looks the daily monitoring data did not sync for some reason. It can happen for example when the watch crashes and reboots while the file is being written to. You can connect to the watch over the USB cable, and have a look at the file //GARMIN/Debug/ERR_LOG.BAK - open it with Notepad or similar text editor, and check whether there are some crash logs from given day. It will not help you to recover the data, but at least you could identify whether it was really caused by a crash.

Recovering will probably be no more possible. When done immediately after the crash, using a program like Recuva, may help to recover lost corrupted files, and eventually fixing them with other tools, but there is little chance the files would be still recoverable later.

Syncing the watch frequently during the day may help preventing the loss of a too long streak of data.

0 7890641 over 2 years ago in reply to trux

Trux,

Thanks for the info. There is indeed an error log (.txt, not .bak) in that folder, data a few days after the missing intensity minutes. Unfortunately, it's just a hex dump and then a series of seemingly random letters, numbers, and characters. And no way to recover, of course. Overall, it's not a big deal. I just had a streak of consecutive weeks meeting my goal dating back to January of this year, but I can start over.