ERROR: Retrieving the LUM proxy username from CASA failed

During the automatic common proxy user password change (every 30 days), the following was observed in
/var/log/messages:

change_proxy_pwd.sh[19311]: ERROR: Retrieving the LUM proxy username from CASA failed

In checking the /var/opt/novell/log/proxymgmt/pxymgmt.log, the following is observed:
  Retrieving LUM proxy username from CASA
  Executing command: /usr/bin/lum_retrieve_proxy_cred username /etc/opt/novell/proxymgmt/proxyuser.txt
  Retry attempt 2
  Retry attempt 3
  Retrieving the LUM proxy username from CASA returned: 255
  ERROR: Retrieving the LUM proxy username from CASA failed.

This has been fixed with January 2015 maintenance (and later).  Therefore, you will want to apply current maintenance to your server.

LUM was not configured with a proxy.  So when the change password script goes to verify LUM's proxy, it encounters an error (as it doesn't exist).

A workaround, until you can apply maintenance is to ensure LUM is configured with a proxy (preferably the OEScommonproxy).  This can be accomplished via YaST->Open Enterprise Server->...->modify the configuration of LUM to use a proxy.  (See Linux User Management for further information.)