Oracle 9i Bug Or Compatability issue with Forms 5

Question

I create this function in Ora 8 and using it in Forms 5. It working fine in forms trigger When-Create-Record.
But when I migrate to Ora 9, it working in SQLs but in forms 5 it genrates an error:
ORA-03113 end-of-file on communication channel
CREATE OR REPLACE function GenerateEmpoyeeID
return char
is
mEmpID char(5);
Begin
select substr(decode(length(max(to_number(empcode))),1,
'0000'||to_char(max(to_number(empcode))+1),2,
'000'||to_char(max(to_number(empcode))+1),3,
'00'||to_char(max(to_number(empcode))+1),4,
'0'||to_char(max(to_number(empcode))+1),to_char(max(to_number(empcode))+1)),1,5)myid
into mEmpID
from ( select empcode from empmst_5
union
select empcode from delmst_6 );
return (mEmpID);
End;
So, please tell me the right way against this Oracle error. I don't want to use it with If-Else statement.

Answer 1

Out of interest have you tried returning VARCHAR2 rather than CHAR?