If you don't need to do variability charts specifically, you can do similar stuff in graph builder.
Names default to here(1);
dt = open("$SAMPLE_DATA\Big Class.jmp");
dt << Graph Builder(
Size( 528, 454 ),
Show Control Panel( 0 ),
X Group Edge( "Bottom" ),
Variables( Y( :height ), Group X( :age ), Group X( :sex ) ),
Elements(
Points( Y, Legend( 10 ) ),
Caption Box( Y, Legend( 9 ), Summary Statistic( "N" ) ),
Box Plot( Y, Legend( 11 ) )
)
);