ora2pg perl module error

Good morning Experts,
after install DBD::Oracle and configure ora2pg.conf.  I run orag2pg and get an error# cd /etc/ora2pg# cp ora2pg.conf.dist ora2pg.conf# vi ora2pg.conf   ---> with modification belowORACLE_HOME /u01/app/oracle/product/12.2.0/dbhome_1ORACLE_DSN dbi::Oracle:host=hostname;sid=CIDR;port-1521ORACLE_USER systemORACLE_PWD xxxxxTYPE TAPE PACKAGE INSERT COPY VIEW GRANT SEQUENCE TRIGGER FUNCTION PROCEDURE TABLESPACE TYPE PARTITION QUERY DBLINK SYNONYM LOAD
#ora2pginstall_driver(Oracle) failed: can't load '/usr/local/lib64/perl5/auto/DBD/Oracle/Oracle.so' for module DBD::Oracle:libclntsh.so.12.1: cannot open shared object file:No such file or directory at /usr/lib64/perl5/DynaLoader.pm line 190 at (evel13) line3.compilcation failed in require at (eval13) line 3.Perhaps a required shared library or dll isn't installed where expected at /usr/local/share/perl5/Ora2Pg.pm line 1570.
the /usr/lib64/perl5/DynaLoader.pm existed and at line 190, I found:my $libreg = dl_load_file($file, $module->dl_load_flags) orcroak("Can't load '$file' for module $module: ".dl_error());
what library/module needed?
thank you. Bach-Nga

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