utl_file_dir & APPLPTMP directory (/usr/tmp --> /p01/temp/prod)
1) DB & AP Server
vi $APPL_TOP/$CONTEXT_NAME.env
APPLPTMP=/usr/tmp --> /p01/temp/prod
vi $APPL_TOP/$ORACLE_SID.env
APPLPTMP=/usr/tmp --> /p01/temp/prod
2) DB Server
vi $ORACLE_HOME/dbs/init$ORACLE_SID.ora
utl_file_dir = /usr/tmp,* --> /p01/temp/prod,*
3) restart