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       lam-helpfile - LAM help message file

       The  lam-helpfile  provides detailed error messages and suggestions for help on how to fix
       common problems.  In many places in LAM, when an error occurs, this help file is consulted
       to display a detailed message of what the error was and, when possible, suggestions on how
       to fix the problem.  It consists of much of the information from the LAM FAQ (particularly
       in dealing with getting LAM up and running)

       At  present, the following LAM tools use this help file (it is expected that more will use
       it in future releases.  If you have suggestions for locations where  more  detailed  error
       messages would be helpful, please let us know):

       mpicc (hcc)
       mpiCC (hcp)
       mpif77 (hf77)

       The  help  file	is multiple blocks of help text separated by single line delimiters.  The
       delimiter lines are of the format:


       Where programname is the general name of the program (or group of programs) that this help
       message applies to, and topicname is the specific topic that this message applies two.

       The  special  keyword  ALL can be used for either the programname or the topicname in some
       cases; this is usually a "wildcard" value where	little specific information is available.

       Within the block of the message, lines that begin with a "#" are treated as comments; they
       are not printed out.

       Three special escape sequences can be used within the help message:

       %N     Where  N	is  a  number  from 1 to the number of arguments that the help message is
	      invoked with.  The "%N" string is replaced with the value of the Nth argument  from
	      the argument list.  The arguments are passed from the LAM binaries themselves; they
	      cannot be edited.  The comments in the default LAM help file explain how many argu-
	      ments each message is invoked with, and what each argument is.

	      Shows the result of the Unix perror(3) function.

	      Shows  the  result  of  the  LAM	terror() function, which is essentially a wrapper
	      around the Unix perror(3) function.

       The exact location of the help file is configurable.  This  allows  system  administrators
       and/or users to customize the help file for their particular environment.

       When LAM attempts to print an error message from the help file, it looks for the help file
       in the following locations (in order):


       Note the two variables $LAMHELPFILE and $LAMHELPDIR; these variables can be set	according
       to platform, for example, to provide operating system-specific information, or information
       specific to particular groups of machines, etc.

       $SYSCONFIDIR is typically $prefix/etc, where $prefix is the  location  to  where  LAM  was
       installed;   it	 was   the  option  supplied  to  ./configure  when  LAM  was  built  (or
       /usr/local/lam-6.5.8, by default).  However, note that the value  of  $SYSCONFDIR  can  be
       overridden when LAM is configured with the --sysconfdir switch.

       The  following is an example customization of the help for the hboot and lamboot programs,
       when the user supplies a host file name that is not found.

       %1 could not open the hostfile "%2" for the following reason:

       Things to check:

		   - ensure that the file exists
		     try "ls -l %2"
		   - ensure that you have read permissions on the file
		     try "cat %2"

       You may not need to specify a host file at all; the system
       administrators have defined the all of Beowulf cluster host names in
       the LAM default host name list.	If you wish to use all of the Beowulf
       nodes, simply execute:

		   %1 -v

       If you have any problems with LAM, please send mail to:


	   default LAM help file

       hboot(1), lamboot(1), lamexec(1), lamhalt(1), lamnodes(1), mpicc(1), mpiCC(1),  mpif77(1),
       mpirun(1), recon(1), tkill(1), tping(1), wipe(1), perror(3)

LAM 6.5.8				  November, 2002			  LAM-HELPFILE(5)
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