I want to get data dump from PDB(Transportable Database). DB version 12.2.0.1.0. Enterprise Edition.
Before i get export i applied oracle 27162931 and 27162975 opatch. then after i altered tablespaces except sysaux and system, temp and undotbs1.

sql> alter tablespace users read only;

[![enter image description here][1]][1]


  [1]: https://i.sstatic.net/oEfaI.png

After logged in to db by using sysdba and then created directory and granted read, write access. 

SQL> CREATE OR REPLACE DIRECTORY exp_dir AS 'D:\export_db';

SQL> GRANT READ, WRITE ON DIRECTORY exp_dir TO system;

Then i logged from system and ran export command like below,

sql> host expdp system/XXXXXX@D1943 dumpfile=DB12cdmp.dmp directory=exp_dir transportable=always full=y version=12.2.0.1.0 logfile=exp_test1.log

but i'm getting error like below,
Processing object type 

DATABASE_EXPORT/SCHEMA/TABLE/INDEX/DOMAIN_INDEX/SECONDARY_TABLE/INDEX/INDEX

ORA-39340: unsupported object, INDEX:"ABC"."SYS_IL0000903003C00006$$" will be skipped.
ORA-39340: unsupported object, INDEX:"ABC"."SYS_IL0000903008C00002$$" will be skipped.