create restore point as of

 Hello all;

I have a question concerning creating a restore point.  I cam across the syntax for creating a restore point using as of and an scn number or date.  I am trying to use it with an acn number, but keep getting an error.

SQL> create restore point test as of scn 459388820 ;
create restore point test as of scn 459388820
                          *
ERROR at line 1:
ORA-00905: missing keyword

I am on 10.2.0.3.  I thuink it is somethig stupid like looking in the 11G manual and not the 10.2 one.  Anyone else have any idea's, since the error points to a syntax issue.

Thanxx..

Peter