Thanks for your help but unfortunately it does not work.
The result is identical to what I had when selectecting a caldendar and try to elminate from Edit / Eliminate.
What happens is as follow:
1. It sees to work. The calendar disapears.
2. But, after 5 secponds it appears again on the list of calendars.
I thought it was the soltuion but nothing. Nothing in this file.
I dragged into the bin the "calendars" file in the "Library".
But no results. Aways the same calendars appeared and no way to delete them.
There is probably a solution to remove ical and all teh connected files so as to start agai from scratch reinstalling ical. How to do that ???