In "statistics Section" of
file /usr/share/doc/rmagic/html/config.html it reads:
File_In
This is the location of the computer readable output from Analog.
It can include a path name (including a drive letter or network
path). This is relative to the directory from which Report Magic
for Analog was run. The special filename '-' can be used to tell
Report Magic to read the input from the standard input (STDIN)
(i.e. your keyboard or a pipe, '|', on a command line). This
option supports the %infile% and %dateformat% codes descibed under
Frame_File_Out (Optional)
This is the name of the frameset page. It no longer uses a path
name or drive letter. (You can put a path in here, but it will be
all files.) This option supports the %infile% and %dateformat%
codes descibed under File_Out in the [reports] section, below. If
no value is given, and Report Magic is producing a frameset, then
this will defaut to 'index.html'.
Notice the two conflicting names. I believe there is typo and
"report_File_Out" is not an option but "report File_Out"