Dear SCO Customer,

Support Level Supplement (SLS) ptf7643b, the UnixWare 7.1.0 or 7.1.1 *.ns.so
and cmds supplement, addresses the following problems:

SLS ptf7643a addresses this issue:

   1. NIS users are unable to log in on a UnixWare 7 NIS client when bound 
      to a SunOS 4.1.4 NIS master.  Logins at the console hang indefinitely,
      and telnets fail with the error:
      
         "telnetd: unable to invoke login scheme" 

SLS ptf7643b addresses these issues:

   2. With the NIS package installed, getgrnam() and getgrgid() were 
      failing with large /etc/group files (> 200 entries in one group).

   3. With the NIS package installed, several OS commands fails when 
      /etc/group file has many users (>200) in one group.


Contents
--------

        /usr/lib/.ns.so
        /usr/sbin/groupadd
        /usr/sbin/groupdel
        /usr/sbin/groupmod
        /usr/sbin/grpck
        /usr/ucb/grpck
        /var/yp/mknetid


Software Notes and Recommendations
----------------------------------

ptf7643b should only be installed on:

        UnixWare 7.1.0 or 7.1.1
        Unixware 7 NonStop Clusters Release 7.1.1

NOTE:  This supplement has been superseded by
the UnixWare 7.1.1 Maintenance Pack for UnixWare 7.1.1 platforms
only.  The UnixWare 7.1.1 Maintenance Pack is available from:

ftp://ftp.caldera.com/pub/unixware7/uw711pk


If your system is running any libraries or commands that are
contained in this SLS, these programs will continue to run
with the old versions of these libraries or commands until the
the system is rebooted.

Note that when all necessary patches have been installed, it is
recommended that you reboot the system at the earliest opportunity.
This will ensure that no programs continue to run with the old
libraries or commands.
  
Installation Instructions
-------------------------

1. Download the ptf7643b.Z file to the /tmp directory on your machine.

2. As root, uncompress the file and add the package to your system
   using these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7643b.Z
        # pkgadd -d /tmp/ptf7643b
        # rm /tmp/ptf7643b

Alternatively, this SLS package may be installed in quiet mode, 
that is, without displaying the release notes and asking for 
confirmation.  To do this, use these commands:

        $ su
        Password: <type your root password>
        # uncompress /tmp/ptf7643b.Z
        # pkgadd -qd /tmp/ptf7643b all
        # rm /tmp/ptf7643b

3. There is no need to reboot the system after installing this package.
   The release notes displayed prior to installation can be found in:

   /var/sadm/pkg/ptf7643/install/ptf7643.txt


Removal Instructions
--------------------

1. As root, remove the package using these commands:

        $ su
        Password: <type your root password>
        # pkgrm ptf7643

2. There is no need to reboot the system after removing this package.


If you have questions regarding this supplement, or the product on
which it is installed, please contact your software supplier.