The following errors occur when running impdp on same database version 12.1.0.2 as the source database:
ORA-39001: invalid argument value ORA-39000: bad dump file specification ORA-39142: incompatible version number 4.2 in dump file "/tmp/exp_tables.dmp"
SOLUTION
- Apply patches to the same patch level for both source and target database.
OR
- Use parameter VERSION.
$ expdp ... VERSION=12.1 ...