The system is currently implemented to run under the X Window System, Version 11, and you must be using a console or monitor running X11 or a compatible windowing system.
FDR insists on one variable being set in its environment:
FDRHOME must be set to the (fully qualified) name of the
directory containing the FDR `LICENCE' file, typically the root
directory of the FDR installation.
If this variable is not set, the tool will terminate immediately with an
error.
A number of other environment variables may be set, to select variant screen layouts and preferred editors, for example. In most cases the default values will be appropriate.
FDREDIT may contain the name of the
editor you prefer to invoke to view script files.
If this is not set, then the environment variables VISUAL and
EDITOR are examined (in that order) and if none of these is set
the editor vi is selected.
In all of the above cases, an X terminal application is launched to host
the editor (so the program xterm needs to be found along your
search path); if your chosen editor opens its own X-window (like
xedit and modern versions of Emacs), then supply its name in the
environment variable FDRXEDIT instead, which overrides the other
variables and launches the editor without the extra terminal
application.
FDRBIN environment variable, if set, determines where the
programs invoked in setting up the FDR process structure are to be
found.
If this variable is not set, the `bin' subdirectory of
$FDRHOME is used to locate them.
FDRLIB environment variable, if set, determines where various
program-related data files are located.
If this variable is not set, the `lib' subdirectory of
$FDRHOME is used to locate them.
FDRBROWSER environment variable, if set, determines which
browser to use to view the hypertext version of the manual. The browser
is assumed to be an X11 application and will be launched directly,
rather than inside an xterm. If FDRBROWSER is not set, a
simple browser written in Tcl/Tk will be used.
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