The Group Output Task writes EPS events to an Ascii text file.
The Group output utility is a logging utility which accumulates information about groups over a period of time.  At the end of this time period the information is written to an Ascii text file.  The fields that are output to this file are user definable.  The output file can be setup to rollover at specified times.  This allows for smaller group event files.    The typical Group output status screen appears as seen below.

Here we can see the output file and when that file will change next.
The group options screen appears as seen below.

If a filter is specified it is defined here.  This is where the ASCII Output file format is defined. 
The Output Definition screen is seen below.

All output fields are fixed length unless Delimited Output is specified. 
Delimited output should be used if the Output data is to be imported into a spreadsheet. 
CR/LF should be specified if the file is to be edited or viewed with a text editor.