Invisible Hatch from Vector Works DWG exported

From DWG files exported off Vectorworks, in Model Space my lines are interrupted with blank area which are non removable, unpickable. If I move my drawings in MS theses black areas stay in place, the problem is: I can drag my drawing away from them but without seeing them, I have no idea where they are. In Paper Space, these invisible hatch turned into grey area in random location and as grey background behind Elevation Benchmark (circle+text), room text, floor section.

Annoying!! Any idea how to reveal and delete these ghost Hatchs?

Try Qselect....

Vectorworks creates a LOT of wipeout objects. Try turning 'TFRAMES' on.