ORA-29335: tablespace 'PERFSTAT' is not read only ( during transport tablespace option )

[veritas:oraprod] /home/oraprod > TAT file=/u43/oradata/stats_dump/perfdump.dmp log=/u43/oradata/stats_dump/perfdump.log <

Export: Release 9.2.0.5.0 - Production on Fri Sep 11 12:44:26 2009

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.

Username: / as sysdba

Connected to: Oracle9i Enterprise Edition Release 9.2.0.5.0 - 64bit Production

With the Partitioning, OLAP and Oracle Data Mining options

JServer Release 9.2.0.5.0 - Production

Export done in US7ASCII character set and AL16UTF16 NCHAR character set

server uses UTF8 character set (possible charset conversion)

Note: table data (rows) will not be exported

About to export transportable tablespace metadata...

EXP-00008: ORACLE error 29335 encountered

ORA-29335: tablespace 'PERFSTAT' is not read only

ORA-06512: at "SYS.DBMS_PLUGTS", line 436

ORA-06512: at line 1

EXP-00000: Export terminated unsuccessfully

Soltuion :

This is because of the tablespace in READ WRITE mode . Before taking the export of metadata, tablespace

needs to be taken in READ ONLY mode