recorder integrator points' displacement in one file

[seu]

I use the tcl script like this:
for {set i 0} {$i < = np} {incr i 1} {
recorder Element -file element1.out -time -ele 1 section $i displacement;
}
When the integrator points number np=5, it products 5 files.
How can I recorder them in one file? The "region" command is not useful.

Just like this but it's not available:
recorder Element -file element1.out -time -ele 1 section 1 2 3 4 5 displacement;