How to Export Oracle Data pump from OCI Autonomous database

schemas=${source_schema_name}
content=DATA_ONLY
directory=data_pump_dir #static, dont change it
dumpfile=single_exp_new%U.dmp # this is the name of the dump file
logfile=export_cyu_2.log #this is the name of the export logifle
version=18.1 # this is important if your target and source database version is different. In my case, i am exporting from 19 and try to import into 18.1

select * from v$timezone_file;
# check timezone version, if source and targe missmatch , the import will fail