intro_error

	Error reporting and logging can be handling through several routines.
      	
	'error_init(_c)' initializes the reporting and logging.  It establishes
	where on the screen (TV or graphics) errors are displayed.
	For the TV, one can establish scrolling regions and other various
	display attributes.  'error_init(_c)' also sets up use of Filesharing
	file for holding a circular log of the entries.
       
	'error_display(_c)' is a function for checking for an error (one can
	specify ACNET, C RTL, system, or integer) and expanding it along with
	user supplied text.  One can also just write informational messages.
	If logging is setup with 'error_init(_c)', a log entry will be written.

	'log_read' is a routine for displaying a log file.  When called,
	'log_read' will provide an environment for the user to view and
	search the log.
	
	'log_write' allows writing a log entry.  This is also possible with
	'error_display(_c)'.
      	
	To create a shared log file, use console page D112 (Log Test).
	Click on the button labelled 'Create a New Log File'.  You will
	then be prompted to enter an 8 character log file name and a
	log file size.  This name can then be used in the function call
	'error_init(_c)'.
	
	See console page D112 (Log Test) for the use of these routines.
	
	CLU routines support circular log files and the log format files,
	including operations to create, open and close log files; to add and get
	lines from the log files; to find the log files last updated record;
	to change the phyical location within the log file, to write the
	current add poisition pointer to the format file, to edit the format
	file, and to get info on the format file.

	Several of the routines accept 16-bit ACNET standard error codes and
	return or display on the screen a short error message (ie 'errhlp(_c)').

	'math_exception_check', used by CLIB routines, checks for arithmetic
	exceptions.

	CNSLOG is a program that will read the standard console program logs
	into a local file, in ASCII text. A directory of log file names is
	available when you run CNSLOG.
      	
	To run CNSLOG enter:
      	
	/usr/local/mecca_head/mecca/services/cnslog/cnslog [{logname}]
      	
	Where you can optionaly specify the "logname"; otherwise you are
	prompted for it while running the program.

	See also 'intro_application_errors'.

	Related functions:

	clu_add, clu_close, clu_get, clu_open, clu_update,
	errhlp(_c), error_clip_depth_c, error_close, error_cmprintf_c,
	error_colored_message_c, error_disp_uti, error_display(_c),
	error_erase, error_imbedded_enabled, error_imbedded_off,
	error_imbedded_on, error_in_list(_c), error_init(_c), error_init_uti,
	error_last, error_message(_c), error_move_disable, error_move_enable,
	error_mprintf_c, error_pop_window, error_printf_c,
	error_query_clipping, error_query_setup, error_size_and_position_c,
	error_trace_get, error_trace_off, error_trace_on, error_trace_view_c,
	error_unpack(_c), error_uti_logging_c, log_read, log_read_setup_c,
	log_write, math_exception_check, math_exception_establish