I am trying to generate some views using the engineering drawings command from the groups toolbar. I selected the objects and specified a plane. Everytime that that i do this a scheme appears in the positions tab as expected but when i try to "attach document" a viewport appears on the new layout but nothing is in it. Ive tried to delete the view and attach the scheme to a different layout and there is still nothing in the viewports. Did i miss a step or do you know what i might be doing wrong to generate an overall view using the engineering drawings command?