The   Compare    Message   Descriptions   command    compares   message
descriptions in  one message file to another and  displays or lists the
results.   Corresponding message IDs are  checked for in both files and
the individual  attributes of a  message description  are compared  for
matching IDs.  A range of message IDs may be specified.

For large message files, the command should be submitted to batch.

A typical command would be:

             CMPMSGD  FROMMSGF(ABC) TOMSGF(DEF)

The message descriptions  for each file would be  converted to outfiles
in  QTEMP.  All message IDs  in the From file that  do not exist in the
To file would be flagged  as well as those in  the To file that do  not
exist  in the  From  file.   For  those  matching  IDs, the  individual
attributes  of a message  description are compared  and differences are
noted.

CMPMSGD escape messages you can monitor for
-------------------------------------------

None.  Escape messages from based on functions will be re-sent.

CMPMSGD Command parameters                            *CMD
--------------------------

   FROMMSGF      The qualified  name of  the From  message file.    The
                 library value defaults  to *LIBL.  A  specific library
                 or *CURLIB may also be used.

   TOMSGF        The  qualified  name of  the  To  message  file.   The
                 library  value defaults to *LIBL.   A specific library
                 or *CURLIB may also be used.

   RANGE         The range of message IDs to be compared.

                 The first part  of the parameter  is the lower  value.
                 The  default  is  *FIRST.    Any  message  ID  may  be
                 specified  and acts as a lower  limit.  The message ID
                 does not have to exist.

                 The second part of the  parameter is the upper  value.
                 The  default  is  *LAST.     Any  message  ID  may  be
                 specified  and acts  as an upper  limit.   The message
                 ID does not  have to  exist.  *ONLY  may be  specified
                 to mean the message ID named in the lower value.

   OUTPUT        How  to output  the  results.   *  is the  default  to
                 display  the spooled  file if  the command  is entered
                 interactively.   The spooled file  is deleted after it
                 is displayed.

                 If the  command  is  entered  in batch  or  *PRINT  is
                 specified,  the spooled file  is output  and retained.


Restrictions
------------

None.

Prerequisites
-------------

The following TAA Tools must be on your system:

     CHKOBJ3         Check object 3
     CVTMSGF         Convert message file
     DUPTAADBF       Duplicate TAA data base file
     RSNLSTMSG       Resend last message
     RTVSYSVAL3      Retrieve system value 3
     SNDCOMPMSG      Send completion message
     SNDESCINF       Send escape information
     SNDESCMSG       Send escape message

Implementation
--------------

None, the tool is ready to use.

Objects used by the tool
------------------------

   Object        Type    Attribute      Src member    Src file
   ------        ----    ---------      ----------    ----------

   CMPMSGD       *CMD                   TAAMSJC       QATTCMD
   TAAMSJCC      *PGM       CLP         TAAMSJCC      QATTCL
   TAAMSJCR      *PGM       RPG         TAAMSJCR      QATTRPG