ORA-39246: cannot locate master table within provided dump files

Hello team,

we are using GG to replicate the 11.2.0.3 to 12.2.x.x container DB (PDB). we are using expdp for initial load.

we have encountered error during import.

Import: Release 12.2.0.1.0 - Production on Fri Jan 19 11:28:24 2018

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Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production

ORA-39002: invalid operation

ORA-39059: dump file set is incomplete

ORA-39246: cannot locate master table within provided dump files

cat expdp.par

dumpfile=GGDIR:dbname_full_%u.dmp

logfile=GGDIR:dbname_full_exp.log

VERSION=12

flashback_scn=123456789

full=y

parallel=10

cat impdp.par

dumpfile=GGDIR:dbname_full_%u.dmp