Thanks for your message, Richard,
1 - Of course it was ai1ec (just a type mistake).
2 - The fact was, that I have hacked the calendar.php file to delete the "filter by tag" dropdown menu. I confirm that the short code operates in a post when putting it back :-)
3 - However, I have still some issues with it (see for instance this page)
a/ since I do not want the user to see all tags, I have replaced all displays with `<?php echo ' ' ?>. But I was not able to delete the loop nor all the <input> lines (see the source code of the page). Is there a way to just "force" the display for a selected cat_name and not go through the loop?
b/ the shortcode calendar is sorted by months : the "upcoming" and "previous" buttons refer to "paginated by month" views. Is there a way to show all upcoming (resp. previous) events like in the regular calendar view?
c/ since I include the shortcode in a page, I would like to "skip" the headings of the agenda : month, valendar and filter buttons. Is there a way to do this only for the shortcode view?
d/ the shortcode view is displayed AFTER the articles add-ons (like + related). This is probably linked to the theme, but is there a way to move it up, just after the text of the post?
Many thanks for help!