Interestly enough what docs says about this error.
ORA-24347 Warning of a NULL column in an aggregate function
Cause: A null column was processed by an aggregate function.
Action: An OCI_SUCCESS_WITH_INFO is returned.
I thing it was designed only as information message (particullarly the "Action:" line leeds me to this conclusion, although I'm not sure why this ORA message at all, as aggregate functions should not be bothered with nulls) and it was ment that you should still get the proper result, something like when you ocasionlly get "ORA-00000 normal, successful completion".
Jurij Modic ASCII a stupid question, get a stupid ANSI
24 hours in a day .... 24 beer in a case .... coincidence?