Can we get this fixed in the Scripting Guide?
//Scripting Guide page 336
dt = Open( "$SAMPLE_DATA\Big Class.jmp" );
dt << Select Where( age < 15 & sex == "F" );
//or
dt << Select Where( age == 14 );
dt << Extend Select Where( sex == "F" ); //does nothing
//Not in guide, but below works
wait(10);
dt << Select Where( sex == "F", Current Selection ("extend")); //extends selection