I created a user "CAO/safirs" in 19c database.
I can access to this user with Sqlplus but not with a very simple old style C Ici program.
This same program can access to 12c database.
ret=orlon(&lda, &hda,"CAO",3,"safirs",6,flag);
It returns 0 (OK) when accessing to 11g, 12c Database, but 1017 when accessing 19c Database.
Thank you