ORA-39166: Object was not found in impdp

Question

I am trying to do an impdp to another database.
Both databases are 11g on AIX.
This is the command I use.
impdp &dUSR/&dPASS@&dCONN REMAP_SCHEMA=&uUSR:&dUSR directory=DATA_PUMP_DIR dumpfile=file.dmp logfile=...log content=DATA_ONLY table_exists_action=truncate 'TABLES=(table1,table2,...)'
&dUSR is for destination databsse.
&uUSR is for source database.
I am getting the following errors:
======================
ORA-39166: Object TAR.TABLE1 was not found.
ORA-39166: Object TAR.TABLE2 was not found.
======================
When import command was modified (table1 -> &uUSR.table1) so it becomes:
impdp &dUSR/&dPASS@&dCONN REMAP_SCHEMA=&uUSR:&dUSR directory=DATA_PUMP_DIR dumpfile=file.dmp logfile=...log content=DATA_ONLY table_exists_action=truncate 'TABLES=(&uUSR.table1,&uUSR.table2,...)'
The import works. I am already using REMAP_SCHEMA so why is this necessary?

Answer 1

VST,
Expdp was done as tables=foo rather than tables=user2.foo.This means that the foo table that is in the dumpfile would have to be originally in the schema running the job. So, let's say your export was
expdp user1/pass1 tables=foo dumpfile=mydump.dmp ...
This means that table user1.foo would have to exist (or you would get an export error) and this table would be in the dumpfile.
So the bottom line is to transfer between databases and schemas I need to use schema either during expdp or impdp and remap_schema is still necessary?If you want the table user1.foo to be imported into the target database, all you need to do is run either this command:
impdp any_prived_user/password full=y dumpfile=mydump.dmp ...
-- this would require that the user1 is already created in the target database. It will create table user1.foo
or this command:
impdp user1/password full=y dumpfile=mydump.dmp ...
-- this would require that the user1 exists because you are running the job from user1.
If you want this to go into another schema, then you will need to use remap_schema in the impdp command.
Hppe this helps
Dean