Execute [subpages] on every page that contains subpages

It is impossible to make with the plugin.

I would recommend to modify theme files.
You should check if current page has subpages and in that case you should show that subpage.

Thanks!

So, i have to modify theme code and it’s impossible to make a code call to the plugin from the theme page, right? (this could be a stupid question)

You should add to template something like this:

<?php
$children = get_pages('child_of='.$post->ID);
if( count( $children ) != 0 ) {
	echo do_shortcode('[subpages]');
} else {
	// no subpages
}
?>

That works perfectly!

Thank you so much!