ORA-01850: hour must be between 0 and 23
ORA-06512: at "HIG_ALERT", line 2246
This error occurred when applying a bespoke schedule frequency to an alert and saving the record. The schedule frequency in this case was named 'daily at 7' and specified as:
freq=daily; byhour=7; byminute=0; bysecond=0;
Use a leading zero in the frequency definition for any single-digit hours, i.e.
freq=daily; byhour=07; byminute=0; bysecond=0;