It is failing in the planning stage. It is not going to the point where the command code
is to be executed to add the volume to the vFiler.
"Define vFiler" should define an object.
Put something like vFilerObj in the "Define vFiler" box.
$VFilerName is where you actually specify the name of the vFiler.
vFilerObj object will be automatically created in the above screens,
by searching for the vFiler Name specified in $VFilerName.
Regards
Abhi