A week or so ago our overnight procedure has started skipping some steps - so for example it performs data reads 2, 3, 4, 5, 7, 8 etc but misses #1 and #6. These data readers can be run manually and there does not appear to be anything wrong with them. They're not disabled in the procedure.
Does anyone have any ideas on what might be the cause of this? It's obviously extremely problematic!