|ORA-01855:||AM/A.M. or PM/P.M. required|
|Cause:||A date specification contained a meridian indicator format code but a valid meridian indicator was not specified. If a meridian indicator code, A.M./P.M. or AM/PM, is included in a date format, the date must include a valid meridian indicator.|
|Action:||Specify the meridian indicator in the correct format, A.M./AM or P.M./PM.