...
Initialize Err with aidainit. Then just once, you must get an Err object using its getInstance method. Give the name of your program to getInstance, like getInstance('Myprogram') then all of your subsequent messages will be lablled labeled in cmlog as coming from the facility 'Myprogram'. After that, you can issue messages to cmlog using the 'log' method Err, or issue messages to cmlog and print them to the local screen using the 'logl'.
...