I wasn't sure where to post this as the problem is affecting everything but we mostly backup Hyper-V. Nothing has been backing up since 14th August and no alerts appeared in the monitoring area in that period to indicate that backups weren't running.
What I have seen is a warning alert in that the database had reached a 2GB size threshold. Even though there was enough disk space on the database server it looks like it stopped trying to write to it because this limit had been reached. The DPM Alerts Windows event log didnt have any events since the 17<sup>th</sup>, the DPM Backup Events didnt have anything since 14<sup>th</sup>. As this is a configurable threshold I increased it to 3GB and performed a consistency check on some VMs that hadnt been backing up since 14<sup>th</sup> August. These backups worked and new events were written to the DPM event logs as normal.
I expected the recovery points to be created to schedule after this as normal but even though consistency checks I initiate manually work it appears that DPM isn't even trying to back up anything at the times scheduled in the PG config.