ORA-29280 Path Invalide

The issue is simple to fix. There is one prerequisit to write a file in PL/SQL, a diractory.

create or replace directory dir_temp as ‘c:\temp’;
grant read, write on directory dir_temp to public;

When the diractory is used like here:

P_DIR IN VARCHAR2 DEFAULT ‘DIR_TEMP’

The variable value has to be UPPER case!