How to troubleshoot sync errors?

I regularly have photos getting stuck syncing from LRc to LR, where I use them for sharing with family and friends. My latest problem was 21 specific photos out of a series of 170 from a birthday party (made with different cameras, so the files weren't even all the same). I tried everything I have tried earlier, but nothing worked, then  FINALLY I got something to work: When I created virtual copies of the 21 stubborn photos INSIDE the shared folder, the ORIGINALS immediately synced. Not the copies, but I didn't want two copies in the shared folder, so that was fine. Don't know if this works for others, but it's worth trying.

Hi, im with a similar problem...

im using the Photoshop Lightroom cc 3.1the most actual at this time.

every time I open and is connect the lightroom stay syncing, so this is normal, but i have 5 files in syncing forever.

I tried to filter the syncing files and 0 photos to be synced, ath the smarthphone is the same 0 to be synced.

please if anyone stay passing for something similar and resolved help me.

Clicking the icon in the top corner doesn't work anymore. Any other ideas on how to resync?

I found that my sync errors were related to virtual copies that had mysteriously shown up in my catalog. After deleting the virtual copies associated with the sync error photo, syncing returned to normal. Responded too soon after trying my fix.. now I have different sync issues.

In Adobe Lightroom CC (ALCC), I chose File, Add Photos and selected the non-synced photos on my iMac hard drive in "Pictures".  This took care of what I wanted in ALCC, not the auto-sync issue.  It is a good work-around until Adobe sends us an update for our sync issue.

FIXED: So I had the same issue for a few months with Lightroom Classic CC showing "Syncing 4 photos" in the top left corner. Whenever I was adding more photos to be synced, that number would increase, but it would come back to showing syncing 4 photos when the new photos were done syncing.

In the Library > Catalog panel, I had All Sync Errors showing 34 photos. I didn't think much of that since I didn't necessarily care about those errors and the number didn't match the number of photos stuck syncing (which was 4).

I went to Preferences > Lightroom Sync, and under Sync Activity I had the log of the (34) errors. That didn't help me much either at the time.

Following one of the suggestions above, I went back to Catalog > All Sync Errors, selected all images and right clicked to choose Remove from All Sync Errors. That gave me a message saying these photos will be removed from Lightroom CC and collections but not from the desktop catalog. Now I am not sure exactly what all that meant, but I proceeded anyway since all that mattered to me was that the images remained in the main catalog.

That step cleared all images from All Sync Errors, but the Syncing 4 photos was still showing in top left.

Now here's the thing. I then went back to Preferences > Lightroom Sync, and this time (after removing all images from All Sync Errors), the Sync Activity section was only showing 4 entries! Each entry was showing issues with Metadata. Clicking on each entry in the log will take you to that image in the folder/catalog (or you can simply go that image manually in LR since it gives you the path and the name of the file. Once you get to the file in the library, the double arrow icon should show with three dots below it, as per the examples higher in this discussion. Clicking the triple dotted double arrow (;P) will show a dialogue saying that the metadata for that photo was changed in Lightroom and asking if you want to save the changes to disk. I clicked Save and after a second (if you mouse over again the section that shows Syncing X photos in top left), the top left corner was now showing syncing 3 photos!

I did the same for the other 3 photos and problem solved. Here's a shorter breakdown of the steps:

- In Library view, go to Catalog panel, All Sync Errors.

- Select all images, right click, choose Remove from All Sync Errors.

- Go to Preferences > Lightroom Sync and identify which images are still present with errors (likely Metadata errors).

- Go to each image and click the triple dotted double arrow icon in the top right of the image thumbnail to solve the metadata error.

Hope this helps.

How did you get that screen to show you what you're syncing and what you're stuck on? I keep getting an error when I shut down saying  "6 photos are still syncing with lightroom mobile", and it never finishing syncing. It's only synced 291 photos (of 1800 I have on creative cloud). I'm trying to figure out what's going on