i've ran into the dreaded empty/blank pak map issue and as it seems links between obj. or lack thereof is one of the main reasons for this.
linking each obj. 1 by 1 in a map with a ton of obj would be nothing but a torture
fortunately it is possible to select an area by dragging with left mouse button! unfortunately if you are stupid enough (who? me?
) to make a selection of the whole map, you'll prolly need a cray or 2 in order to calculate the links.however creating little pockets and then linking them seems to be a fine and easy way of doing things.