I upgraded to iOS 18.4 earlier this and ever since the app stopped recording properly and changes don’t seem to get applied. Instead, it appears as if the app is stuck at “Processing timeline.”
What to do?
Hi @hleibenath!
It won’t be anything to do with iOS 18.4, that’ll just be a coincidence. But we still need to find out what is causing the problem!
What do you see in the timeline view for today? What kind of data are you seeing there? Like, are there lots of timeline items visible? Are they looking like a mess? Or just one timeline item? Or…
And what about yesterday, and recent previous days? Basically when the app is stuck “processing” for a long time it usually means there’s a lot of messy data that the processing engine is bogged down trying to work through. And possibly some of it is in a state that the processing engine isn’t smart enough to figure out.
So what we need to do is find out what’s clogging it up, and figure out how best to help the processing engine along. Which usually means doing a bit of cleanup ourselves - identifying obvious correct things in the timeline and going through to confirming those ones, or correcting obviously wrong ones.
Each time you do your own confirms/correct like that, it reduces the workload on the processing engine. And if we’re lucky it might also get the processing engine unstuck, on some problem it couldn’t figure out.
Hi Matt!
Thanks for getting back to me and interestingly enough, after being stuck for 3 days, it appears as if Arc Timeline is working normally again this morning. Funny how that works sometimes. Data for the past 3 days is mostly garbage (for example, it says I’ve been driving for 9 hours between Wednesday at 9pm and Thursday at 6am (I was asleep in bed for most of that time) but other than that data is being captured as it has been before.
Obviously, I cannot reproduce my problems anymore as of right now but here are some symptoms that might help you figure out what might have been stuck:
- Other than the driving mentioned above, no data was captured for any time on Wednesday.
- I’ve gone in multiple times trying to correct the Driving to Stationary but the app wouldn’t save it. The app showed similar behavior with other timeline items during the 3 days it was stuck.
- I didn’t try to confirm/correct any other items in fear of making the problem worse not better.
Either way, I appreciate your responsiveness and mostly love the app! And due to the problem I’ve had, I’ve finally come across your other apps and am trying them now. And I’m very much looking forward to the Arc Editor that I’ve seen mentioned in this forum!
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Glad to hear it self corrected!
Though always frustrating when there’s no explanation for why something happened, even if went away on its own. Has that vibe of “it could come back any time, and I still won’t know why!”
Ah I know this one well. Or rather, I’ve experienced it enough for it to be very familiar. But as is often the case, I don’t have a good explanation for exactly why it might be happening. Weird quirks like that tend to happen during normal use, but not when I’m actually working on the app, with it connected to the debugger. So by the time I get to investigate it it’s gone 
The good news is all of those kinds of mystery bugs are gone in the new Arc Editor! And I’m getting so close to having it ready for public beta 