You probably have placed these "probe" devices in the
layout that don't have an appropriate schematic
counterpart, or a proper LVS rep (they probably are
not meant to be in the layout anyway, do you expect
to print a "probe" in fab?).
I'd begin with doing schematic and layout tree reports,
and grep them both for 'probe'. This should get you to
"where".
If you find them then you either want them gone, or
set / add property lvsIgnore="t".
Now you might also want to look carefully at your
"layout" master as presented to Assura and make sure
it's really the right block, because feeding a schematic
to the layout extract process will result in some kooky
stuff. Make sure it's not just a matter of misdirection.