Deleting invisible walls

[chiefdwcox]

I have several places where invisible walls seem to have generated themselves, and they refuse to be deleted.  They look like a dashed line on the plan, and affect the ability to generate other wall types.  For example if I try to draw a wall through the invisible wall, it will only draw a wall on one side or the other.  I select this hash tag line, open it, and it indicates it is an invisible line, but it won't let me delete it.  Any suggestions?  Thanks.

[glennw]

They are auto generated walls that connect rooms inside other rooms.

You can turn off this behaviour at Defaults...General Wall Defaults...Connect Island Rooms (Alt+Q).

You may have room definition problems in certain situations with this setting toggled off.