EBAB03F1: Insufficient system resources exist

Ghost 14 backups now fail with:

 

"Error EC8F17B7: Cannot create recovery points for job: Drive Backup of (F:\). Error E7B70001: Win32/Win64 API DeviceIoControl(IOCTL_VSNAP_SET_SNAP_VOLUMES) failed. Error EBAB03F1: Insufficient system resources exist to complete the requested service."

 

What kind of "system resources" might this mean?

 

Backups have been working for years (so restoring to a few weeks ago perhaps may solve it).  This machine has 3GB RAM.  I can try increasing Virtual Memory (currently 4608MB) but I see (monitoring during a backup attempt now) that only 254MB of the system's Virtual Memory is in use.

 

I wonder if this might be related to the IRPStackSize increase (to 18 from the default [15]) I made yesterday in the registry because I started getting "Not enough server storage is available to process this command" when trying to access shares over the network; solved that issue, but now Ghost can't complete a backup job.