Dont know if this is known already...
I play with SE 0.6.87
The mod Scan Area (1.0.2) caused a non-recoverable error.
Please report this error to the mod author.
Error while running event ScanArea::on_player_selected_area (ID 51)
ScanArea/control.lua:38: attempt to compare nil with number
stack traceback:
ScanArea/control.lua:38: in function <ScanArea/control.lua:1>