I've been able to get a schema export but the import command
impdp user/pwd directory=datadump dumpfile=test.dmp remap_schema=gcs:test
gives
Import: Release 10.1.0.2.0 - 64bit Production on Thursday, 26 February, 2004 15:08

Copyright (c) 2003, Oracle. All rights reserved.

Connected to: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
ORA-39002: invalid operation
ORA-39070: Unable to open the log file.
ORA-39088: file name cannot contain a path specification

I created the directory with the command
create directory datadump as '/u02/hrdmadm';
The log file import.log is being written to /u02/hrdmadm in spite of the above message.
Any ideas.