I'm calling Oracle DBMS_PIPE.UNPACK_MESSAGE in pl/sql on the same database under dirrerent username. It work well under one username,but I get the "ORA-06559 error ,wrong datatyperequested,2;actual datatype is 1 " under another username. I am sure that there is no problem in datatype because only the username is different and other things is the same.
Is it the problem abuot the configuration ?

thank for the help.