R0 Rollback Segment in Import of 10gR2 into 11gR2 Database

I have a new install of Oracle Database Server Enterprise Edition 11.2.0.3.6 on AIX 7.1.
I used the DBCA to create two databases and used export datapump and import datapump to upgrade two 10gR2 database to 11gR2.
One of the import logs includes the following messages:
Processing object type DATABASE_EXPORT/ROLLBACK_SEGMENT
ORA-39083: Object type ROLLBACK_SEGMENT failed to create with error:
ORA-02221: invalid MAXEXTENTS storage option value
Failing sql is:
CREATE ROLLBACK SEGMENT "R0" TABLESPACE "SYSTEM" STORAGE(INITIAL 131072 NEXT 131072 MINEXTENTS 2 MAXEXTENTS 2147483645)
I verified that the source database has R0 with maxextents of 2147483645.
I can copy and modify the CREATE ROLLBACK statement and lower the value assigned to MAXEXTENTS, or use MAXEXTENTS UNLIMITED, then run the command in the target database.
In light of the fact that the DBCA did not create R0 in my two 11gR2 databases, I want to know if I still need to create R0 in the one that showed the error in the import log. Has anyone else noticed the disappearance of R0?
Here are the rollback segments that exist in the 11gR2 database at this time:
SQL> Select SEGMENT_NAME, OWNER, TABLESPACE_NAME, INITIAL_EXTENT, NEXT_EXTENT, MIN_EXTENTS, MAX_EXTENTS, PCT_INCREASE, STATUS
from SYS.DBA_ROLLBACK_SEGS;
SEGMENT_NAME OWNER TABLESPACE_NAME INITIAL_EXTENT NEXT_EXTENT MIN_EXTENTS MAX_EXTENTS PCT_INCREASE STATUS
SYSTEM SYS SYSTEM 114688 57344 1 32765 ONLINE
_SYSSMU1_3638931391$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU2_3033359625$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU3_2670780772$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU4_286801445$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU5_1738828719$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU6_3548494004$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU7_700714424$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU8_2755301871$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU9_2087597455$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
_SYSSMU10_3267518184$ PUBLIC UNDOTBS1 131072 65536 2 32765 ONLINE
11 rows selected.
Thanks,
Bill

Srini,
Both the 10gR2 and 11gR2 versions of the database are using automatic undo management.
Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
SQL> show parameter undo
NAME TYPE VALUE
_undo_autotune boolean TRUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show parameter undo
NAME TYPE VALUE
undo_management string AUTO
undo_retention integer 14400
undo_tablespace string UNDOTBS1
SQL>
Do you know anything about Oracle no longer automatically creating R0 in 11gR2?
Thanks,
Bill

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