Hi,
 Sorry for the long post but I see posts with too little data and
subsequent responses requiring more data AND the correct data to debug
this issue may not even be in this post!!!

 Pls keep in mind that I have 27 AIX client's running, successfully, and
ALL client's have been configured identically except for the pertinent
local stuff per client.

 ALL SERVERS WORKED INITIALLY......

 HISTORY:
 A different client had the same issue yesterday and I finally got fed
up with trying to figure the issue out and deleted the filespace(s) and
client from the TSM server and re-registered it.
 THIS IS NOT AN OPTION THAT I CARE TO REPEAT..... but it did work   :>(

 The same failure occurs if ran via script or cmdline...

 The incremental backups are via a ksh script as follows:
 cat /sys_adm/bin/daily.backup.ibm:
********************* snip ********************
#!/bin/ksh
#set -xv
# Test for the proper OS
OS=`uname`
if [ $OS != "AIX" ]; then
        echo This script is written for AIX systems. You are on $OS.
        exit 1
fi

# Set variables
export REMOTEHOST=einfo
export HOSTNAME=`/usr/bin/hostname -s`
export HOSTCAPS=`echo $HOSTNAME | tr '[a-z]' '[A-Z]'`
export LOGDIR=/sys_adm/logs/backup
export LOGFILE=$LOGDIR/daily.backup.log
export INCLEXCL_FILE=/usr/tivoli/tsm/client/ba/bin/.inclexcl
export DATE=`date "+%y%m%d"`

> $LOGDIR/daily.backup.log

# Set the recipient for notification
if [ -s /sys_adm/bin/recipient ]; then
        RECIPIENT=`cat /sys_adm/bin/recipient`
else
        RECIPIENT=root
fi

# Test conditions
if [ ! -x /usr/tivoli/tsm/client/ba/bin/dsmc ];then
        echo "tsm - dsmc is not installed!"
        exit 1
elif [ ! -d $LOGDIR ]; then
        echo "$LOGDIR does not exist!"
        exit 1
fi

# Initialize logfile
echo > $LOGFILE
date >> $LOGFILE
echo >> $LOGFILE

# Run pre-backup script
if [ -x /sys_adm/bin/daily.backup.preproc.ibm ]; then
        /sys_adm/bin/daily.backup.preproc.ibm
else
        echo "Skipping pre-backup directives .." >> $LOGFILE 2>&1
fi

# Do the backup
cd /
/usr/tivoli/tsm/client/ba/bin/dsmc incre >> $LOGFILE 2>&1

# Test the return code from dsmc and send an email notification
if [ $? -ne 0 ]; then
        echo "FAILED daily backup: Please see the file $HOSTCAPS:$LOGFILE
for mor
e information." | \
 mail -s "FAILED daily backup on $HOSTCAPS" $RECIPIENT < $LOGFILE
        else echo "SUCCESSFUL daily backup of $HOSTNAME." | \
 mail -s "SUCCESSFUL daily backup on $HOSTCAPS" $RECIPIENT < $LOGFILE
fi

# Run post-backup script
if [ -x "/sys_adm/bin/daily.backup.postproc" ]; then
        /sys_adm/bin/daily.backup.postproc >> $LOGFILE 2>&1
else
        echo "Skipping post-backup directives .." >> $LOGFILE 2>&1
fi

exit 0
******************* snip ********************


 Following is the returned error codes:

tsm server side:
 q actl:
06/26/02 00:15:00     ANR0406I Session 221 started for node EDEVPMS2
(AIX)
                       (Tcp/Ip
9.3.32.55(32944)).
06/26/02 00:15:00     ANR0424W Session 221 for node EDEVPMS2 (AIX)
refused -
                       invalid password
submitted.
06/26/02 00:15:00     ANR0403I Session 221 ended for node EDEVPMS2 (AIX).



tsm client side:
  cat dsmerror.log:
06/21/02   20:30:49 sessOpen: Error 137 from signon authentication.
06/26/02   00:15:00 sessOpen: Error 137 from signon authentication.
06/26/02   00:15:00 sessOpen: Error 137 from signon authentication.
06/26/02   00:15:00 ANS1025E Session rejected: Authentication failure

06/26/02   10:15:14 sessOpen: Error 137 from signon authentication.

tsm client side:
 cat /sys_adm/logs/backup/daily.backup.log:
Wed Jun 26 00:15:00 CDT 2002

Skipping pre-backup directives ..
Tivoli Storage Manager
*** Fixtest, Please see README file for more information ***
Command Line Backup Client Interface - Version 4, Release 2, Level 1.25
(C) Copyright IBM Corporation, 1990, 2001, All Rights Reserved.

Node Name: EDEVPMS2
Please enter your user id <EDEVPMS2>:
ANS1025E Session rejected: Authentication failure

Skipping post-backup directives ..


 The above is a starting place but maybe something will be pointed to...

Lindsey Thomson