ORA-39046: Metadata remap REMAP_TABLESPACE has already been specified.

Import: Release 10.2.0.4.0 - 64bit Production on Wednesday, 22 January, 2014 15:35:42

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Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production

With the Partitioning, Real Application Clusters, OLAP, Data Mining

and Real Application Testing options

ORA-39001: invalid argument value

ORA-39046: Metadata remap REMAP_TABLESPACE has already been specified.

?11g & abover:
REMAP_TABLESPACE=old_A:new_A
REMAP_TABLESPACE=old_B:new_B10g:
REMAP_TABLESPACE=old_A:new_A,old_B:new_Bif old_A &?old_B are the same, then will alert this error.