expdp-->Dump of the future.

expdp -- is the dump of the future. In order to successfully run expdp I had to do the following steps:-

CREATE DIRECTORY dumplocation '/home/oracle/dumpfile/' ;
GRANT read, write on dumplocation to mhg; 
ALTER user mhg TEMPORARY TABLESPACE temp ;

At this point I was getting the error
ORA-25153: Temporary Tablespace is Empty
ALTER tablespace temp add datafile 200M ;

At this point I issued the command
 expdp directory=dumplocation

Export: Release 10.1.0.2.0 - Production on Friday, 05 November, 2004 19:47

Copyright (c) 2003, Oracle.  All rights reserved.
;;;
Connected to: Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 -
Production
With the Partitioning, OLAP and Data Mining options
FLASHBACK automatically enabled to preserve database integrity.
Starting "MHG"."SYS_EXPORT_SCHEMA_04":  mhg/********@test
directory=dumplocation
Estimate in progress using BLOCKS method...
Processing object type SCHEMA_EXPORT/TABLE/TABLE_DATA
Total estimation using BLOCKS method: 576 KB
Processing object type SCHEMA_EXPORT/SE_PRE_SCHEMA_PROCOBJACT/PROCACT_SCHEMA
Processing object type SCHEMA_EXPORT/TABLE/TABLE
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
Processing object type SCHEMA_EXPORT/TABLE/CONSTRAINT/CONSTRAINT
Processing object type SCHEMA_EXPORT/TABLE/INDEX/STATISTICS/INDEX_STATISTICS
Processing object type SCHEMA_EXPORT/TABLE/COMMENT
. . exported "MHG"."SYS_EXPORT_SCHEMA_01"                84.57 KB     810 rows
. . exported "MHG"."SYS_EXPORT_SCHEMA_02"                84.57 KB     810 rows
. . exported "MHG"."SYS_EXPORT_SCHEMA_03"                84.57 KB     810 rows
.............................................