DL acknowledging line that are not there.

As shown in the pics above, there is a large dark area where there are no DL lines at all.  I have attempted to reload the game, turn DL off and on again, turn player visuals off and on again, deleting the PC tokens and replacing them, removing all DL lines and redoing them (lines only no free hand).  The wall on the bottom and the window is working fine. If the token is moved into the dark area it can see the room its in but not the area outside of it. So it certainly seems to be reading a line there....but there isn't one.  Any tips?  Thank you!

Hi TJB.,  This usually happens when a line is too big with too many turns or turns too sharply. It creates an "imaginary" DL line somewhere else.  To resolve it:  Duplicate the page On the duplicate, remove 1/2 of the DL lines.  If the problem is resolved, it is in that 1/2 you removed. If the problem remains it is in the 1/2 that were not removed.  Undo (Ctrl+Z) to put the lines back. (If they don't come back, create a new copy of the original page and move to that new copy.) Repeat the 1/2 test, but this time only on the 1/2 of the map that is the problem.  That will narrow it down to 1/4 of the map. From there you can select lines and delete them until you find the offending line.  Go to the original page, delete the line you found to be causing the problem, redraw it in shorter segments. Try not to make hard turns (use separate overlapping lines to avoid that). 

Ah, I see. Thank you very much for the instructions!