How to remove a variable in Graph builder

[#1]

Hello,

I am trying in the script below to remove the variable  age in the X axis but I can't achieve to remove it this way, does anyone had the same issue ?

Note: I know I could remove it with Remove variable(index) but I don't know in advance if this variable is in the graph, so I want to avoid accidentally deleting another graph via the index.

Names Default To Here( 1 );

dt = Open( "$SAMPLE_DATA/Big Class.jmp" );
gb = Graph Builder(
	Size( 528, 464 ),
	Show Control Panel( 0 ),
	Variables( X( :sex ), X( :age, Position( 1 ) ), Y( :height ), Color( :sex ) ),
	Elements( Points( X( 1 ), X( 2 ), Y, Legend( 17 ) ) )
);

wait(2);
gb << Remove Variable( {:age, Role( "X" ), Position( 1 )} );
gb << get variables();

[#2 · Accepted solution]

Works when you add an  inner position as well:

gb << Remove Variable( {:age, Role( "X" ), Position( 1 ), Inner Position(1)} );