The recommended approach to copying the Vertica database to another server is via the Vertica copycluster command.
The cause was the full path to copydrdata.ini file was not specified:
CA Performance management r3.6 above.
The solution is specify the full path to the .INI file, in the below example the slash before home was missing:
vbr.py --task copycluster --config-file /home/dradmin/copydrdata.ini
Pleas note this only covers one example, there are multiple reasons why vbr copycluster command can fail. To get a better understanding run the vbr command with debug 3 (default is 0)
vbr.py --task copycluster --debug 3 --config-file /home/dradmin/copydrdata.ini