Replying to mark TOTAL OF ALL PREVIOUS POSTS IN THIS DISCUSSION as the SOLUTION. But please continue to post any questions/comments.
  As with all backup issues, first check the Avamar Activity monitor. Log in to AUI  https:// /aui   as root Go to the Activity Monitor     [IMAGE]     To view logs for a failed backup, click on the activity. [IMAGE]   Click “View Logs” [IMAGE] Note the two slider bars on the right side. There are multiple logs.   Scan here for errors. Make note of errors found. You may be able to find some helpful KBs by searching for “Avamar ” here: [URL]    If you are not able to find a resolution, open a Service Request. Continue reading for some additional information that you can collect and provide once the SR is opened. If you have multiple proxies and do not know which one is being used for this backup, use the browser to search for proxyhost. [IMAGE] In this example, the proxy hostname is ‘proxy’     SSH/putty to the proxy using the hostname. [IMAGE]   Login as user ‘admin’ Once connected to the proxy, switch to root su -   Run these commands and copy the output. Add this to the Service Request. avtar --version cat /etc/resolv.conf tail -50 /usr/local/avamarclient/var/avagent.log nslookup    nslookup    Substitute the actual Avamar server and proxy hostnames in the last two commands above.     If you are able, collect the logs from the proxy and attach them to the Service Request, or provide them to the TSE once contacted.   Change to the logs directory cd /usr/local/avamarclient/var   Create the compressed tar file with log files that have Error or FATAL.    tar zcvf /home/admin/$(hostname)-$(date +%Y%m%d).tgz $(egrep -l "Error <|FATAL| " *log)   A file with the hostname of your proxy and today’s date, will be created in /home/admin.   Change ownership of this file, so that you can transfer it with WinSCP. chown admin /home/admin/$(hostname)-$(date +%Y%m%d).tgz   Log in to the proxy with WinSCP and transfer the file from /home/admin/ on the proxy to your workstation. Upload the file to the SR once created.
vSphere Image backups failing