Dear SCO Customer,

The enclosed Support Level Supplement (SLS) PTF3096, the cron Utilities 
Enhancement Supplement, corrects the problem of intermittent 'cron' failure 
in SCO UnixWare Release 2.1.1 and 2.1.0.
 
cron and at jobs fail intermittently when trying to open /etc/cron.d/NPIPE,
causing the error message "Cannot open message queue" to occur.

The failure occurs when two processes try to open NPIPE simultaneously.

The new version of cron utilities allows the open system call to execute 
until it succeeds.

Since this change affects the at, atrm, and crontab commands, the entire 
set of 'cron' utilities is contained in SLS PTF3096.


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

PTF3096 should only be installed on these releases:

        SCO UnixWare Application Server Release 2.1.0
        SCO UnixWare Application Server Release 2.1.1
        SCO UnixWare Application Server Release 2.1.2
        SCO UnixWare Personal Edition Release 2.1.0
        SCO UnixWare Personal Edition Release 2.1.1
        SCO UnixWare Personal Edition Release 2.1.2


Installation Instructions
-------------------------

1. Become root and create a new directory by typing the following:
 
     $ su
     Password: <type your root password>
     # mkdir /tmp/pkg
     # chmod 700 /tmp/pkg
     # cd /tmp/pkg

2. Download the ptf3096.Z and the ptf3096.txt files to the newly
   created /tmp/pkg directory on your machine.
 
3. Read the Release Notes contained in the ptf3096.txt file.
 
4. Uncompress the file and add the package to your system using these
   commands:
 
     # uncompress /tmp/pkg/ptf3096.Z
     # pkgadd -d /tmp/pkg/ptf3096 


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

1. Become root and remove the package by typing these commands:

     $ su
     Password: <type your root password>
     # pkgrm ptf3096


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

We appreciate your business.

SCO Support Services