I'm having some issues on my PC with sending DNG files from my Canon 50d to Lightroom Mobile. Images taken on our iPhones (5c and 4s) are being uploaded just fine and appearing on my PC, but nothing from the PC is being sent to LR Mobile. I'm not getting any indication that anything is in "queue" to be transferred and there is no indication of anything in the status (Top Left of LR Desktop, by the Identity Plate). When I hover over the tiny "Sync" icon for each of the DNG images that won't sync, it says "Sync with Lightroom mobile Pending". I've upgraded my PC software to the latest version, rebooted my computer (Windows 7), and made sure I have the latest release of LR Mobile on our iOS devices. The DNG files just don't want to go out to the cloud. Any thoughts?
I did get it working again, but it's not the best solution... I went into LR Desktop and looked at the "Preferences" > "Lightroom Mobile" and selected "Delete All Data". This removed all image information from the cloud and all LR Mobile clients/devices. All edits and info were still OK, since LR Desktop was able to receive from LR Mobile (it just couldn't transmit to LR Mobile). Then, once everything was deleted, I rebuilt LR Mobile from LR Desktop. All seems to be functioning now, as it finishes the rebuild.
Glad that its working again. When you run in to such an issue again it would be great to have a look at your Lr Desktop diagnostig log.
You can trigger the log via LR Desktop preferences -> Lightroom Mobile and when you hold down the alt key you will notice a generate diagnostic log button