autocal_asc is an interactive utility and does not take any argument in command line. How do you use it in a script for mass modifications like removing a large number of old dates or getting the list of all the calendars.
The solution is to build a shell script using autocal_asc as in the following example:
Example: Get the content of several calendars:
autocal_asc << EOF cal1 p EOF autocal_asc << EOF cal2 p EOF autocal_asc << EOF cal3 p EOF ...