Tabulate - N categories ?

[#1]

Tabulate and Tables/Summary are very similar, but ...
hey, Tabulate, what is the difference between counting numerical and non-numerical categories?

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
dt << Summary(
	Group( :age ),
	N Categories( :sex )
);

dt << Tabulate(
	Show Control Panel( 0 ),
	Add Table(
		Column Table( Analysis Columns( :sex ), Statistics( N Categories ) ),
		Row Table( Grouping Columns( :age ) )
	)
);

Tables/Summary:

Tabulate: 

same settings, but Tabulate will fail and generate a warning:

[#2 · Accepted solution]

dirty workaround: 

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
Tabulate(
	Transform Column(
		"sex_num",
		Formula( Col Rank( :sex, <<tie( minimum ) ) )
	),
	Show Control Panel( 0 ),
	Add Table(
		Column Table( Statistics( N Categories ), Analysis Columns( :sex_num ) ),
		Row Table( Grouping Columns( :age ) )
	)
);

[#3]

fun fact:
for header statistics, N unique (= N categories)  is available for categorical entries:

... but not for continuous ones: