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 I altered tablespaces except sysaux and system, temp and undotbs1:

    alter tablespace users read only;

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


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

Next I logged in to the database using sysdba and then created directory and granted read, write access:

    CREATE OR REPLACE DIRECTORY exp_dir AS 'D:\export_db';
    
    GRANT READ, WRITE ON DIRECTORY exp_dir TO system;

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

    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.