Narrowing it down a bit. getting these messages yesterday on the server running the original backups, and the job that was supposed to backup 10 databases only backed up 2 then stopped.

"[font="Courier New"]There is insufficient system memory to run this query[/font]."

The load and jobs have not changed in the last year. 4 G of ram on the server, but task manager shows 2.2 G used and 1.7 G free. I would think more should be used. ?

Task Manager -> Processes shows sqlservr.exe using 1.7 G